Maximize Space with a 3D-Printed Shampoo Bottle Holder for Your RT Agile Bathroom

RV Bathrooms are often tight on space, especially when it comes to storing essentials like shampoo bottles and other toiletries. In my Agile, there's an awkward, often wasted space next to the toilet bowl—an area that could be turned into a highly functional storage solution. Enter the 3D-printed shampoo bottle holder! In this post, I’ll show you how to use that space efficiently by creating your very own custom holder with a 3D printer.

Say Goodbye to Shin Injuries: Custom 3D Print Bumper Cover for Your Roadtrek Sprinter Swivel Seat Release Lever.

If you’ve got a Sprinter Roadtrek van, you know how great it is for road trips and adventures. But let’s be real: that metal swivel seat release lever can be a real pain—literally! Those sharp edges are notorious for catching shins and causing some pretty nasty bruises. Luckily, there’s an easy fix: a custom 3D printed bumper cover. Let’s dive into why this simple addition can make a world of difference!

The Dreaded Swivel Seat Release Lever

We’ve all been there. You’re hopping in or out of your van, and BAM! That metal lever gets you right on the shin. Ouch! It’s a common complaint among older Sprinter Roadtrek owners, and it’s especially concerning if you’ve got little ones or pets. The last thing you want is for someone to get hurt just trying to get comfy in the van.

Custom 3D-Printed Flip Cover for ScanGauge 3 Monitor

If you're like me, you love having all your vehicle’s critical information right at your fingertips. The ScanGauge 3 monitor is an incredible tool for monitoring everything from fuel efficiency to engine performance. But, as with any tech device, keeping it safe from accidental bumps, dust buildup, and potential theft is essential. That’s where a custom 3D-printed flip cover comes in.

Why a Flip Cover?

While the ScanGauge 3 is durable, adding an extra layer of protection is always a smart move, especially if you're frequently on the road. Whether you're into RVing, off-roading, or daily commuting, your dashboard can be a busy space. A flip cover can protect the screen from scratches, sun glare, dust, and—importantly—help deter theft.

Wiring Android Head Unit to Coach Batteries

To utilize the Android head unit without starting the engine or depleting the chassis battery (when used with the ignition set to ACC), I rewired the Android head unit to operate off the coach batteries. It's a great way to enjoy streaming media like YouTube, Netflix, Spotify, etc. when parked or relaxing at the campground using the upgraded Android head unit's larger screen. It's also an excellent way to get the navigation started to our destination before starting the engine. A dash switch is installed to toggle the power of the head unit between ignition only and always on. A simple wiring modification and the addition of an automotive relay are all that is required. This is how I did it.

ML-ACR and DC-to-DC Charger Transfer Relay with Time Delay Start

 

If you upgraded from Blue Sea ML-ACR to DC-to-DC charger and wants to keep the ACR functional, this is for you. I added a Renogy 40-Amp DC-to-DC charger (this post) and decided to keep the Blue Sea ML-ACR as a backup alternator charger for our coach batteries.  It will come in handy if the starter battery needs a boost from the coach batteries. When connected to shore power, it can also be used to charge the chassis battery. This mod will also work on battery separator system, although wiring for the separator will be different.

The changeover/transfer relay only activates one charger at a time, either the ACR or the DC-DC, turning them on at the same time could cause some issues down the road. I also added a time delay relay for the DC-to-DC charger D+ trigger so that it does not immediately turn on as soon as the engine is started. I added a 3-minute delay (user selectable) to allow the chassis voltage to stabilize before starting the DC-to-DC charger. Here's how I did it.

Replacing/ Upgrading Sprinter Door Speakers, and Dash Tweeters. Installing Sound Deadener on Cab Floor

Our factory door speakers broke, the rubber surround that holds the paper cone has disintegrated into pieces, causing the speakers to sound terrible. I used an eBay speaker adapter to replace it with a larger speaker. The factory speaker is proprietary and cannot be simply replaced with an aftermarket speaker without the use of an adapter or some modifications.

The new speakers have a much better dynamic range and a deeper bass response. I also replaced the tiny dash tweeters and was very pleased with the upgraded speakers. Here's how to change them.

DIY DC-to-DC Chassis Battery Trickle Charger (Trik-L-Start Alternative?)

You've probably heard that the Trik-L-Start DC-DC battery trickle charger has been discontinued, the only commercially available alternative is the Echo 15-Amp Charger by Xantrex. The Echo Charger is quite expensive at around $150 and only compatible with lead acid batteries.

I wanted to add a chassis battery trickle charger from my Solar Charge controller's auxiliary output but couldn't find an inexpensive low current DC-DC trickle charger for my application. The Trik-L-Start trickle charger would have been ideal, but they are no longer sold, necessitating the DIY approach. With the addition of a battery protection module to the circuit, it will mimic the Trik-L-Start trickle charger and can be adjusted to start/stop charging depending on the source voltage.

Sprinter Vital System Monitoring using ScanGauge III

My UltraGauge monitor lost many of its gauges after the MB Approved Emission Modification. I did like the UltraGauge when it was working, but UltraGauge support is almost nonexistent and there is no current firmware update to fix the issue, so...I jumped over to Linear Logic and got their new ScanGauge III.

NOTE: My 2011 Roadtrek Agile was built on a 2010 Freightliner Sprinter chassis with an OM642 3.0 L 6-cylinder engine. AEM (Approved Emission Modification) was performed at the MB dealership, and a new updated ECU was installed.

Roadtrek Sprinter Eclipse Head Unit Upgrade to 10-inch QLED screen Atoto S8 Premium (2nd Gen)

Our 11-year-old Eclipse AVN4430 head unit with TomTom navigation maps is now woefully outdated. I won't miss its small, difficult-to-read screen or any of the other quirks that came with it. Enter the Atoto Android head units, which are rapidly gaining popularity. Their premium, ultra, and ultra plus models boast a QLED display that remains easily readable even in bright sunlight. Opting for the larger 10-inch Atoto S8 Premium model was a no-brainer for me, especially considering its affordability compared to other high-end units with similar specs.

Installing an On-Board Air Compressor (Maxi Trac)

Finding the right RV compressor can be challenging, especially if you want one that can inflate RV tires to a high pressure. Many RVers highly recommend the Viair RV compressor. Off-roaders and overlanders choose the ARB CKMTA12 On-Board Twin High Performance Air Compressor because it is a quick and dependable inflator, but it is pricey.

I'm looking for a low-cost, high-output, high-pressure compressor capable of quickly inflating RV tires, air mattresses, and inflatable toys (kayaks, SUPs, and so on). Our 120-volt portable compressor inflates one SUP in about 20 minutes, which is excruciatingly slow. The Napa Maxi-Trac air inflator is getting a lot of buzz in the DIY community, so I took the plunge and ordered one. With a 20% OFF coupon, it cost me slightly more than $100.

"Scooler", A Custom Built/ DIY Electric Riding Cooler

"Scooler" at the beach.

I need a new roto-molded cooler but I do not like the idea of manually hauling it around as they are heavy, so it got me thinking...why not make it a riding cooler? I later found out that you can actually buy one of these riding coolers; they’re not cheap though not to mention the inefficient coolers they use. Amazon sells the "Crazy Cooler" with 4-stroke 2HP engine.

Roadtrek Bedding Options

This is a widely discussed topic in RVing, many swear by RV Superbag which I also own. Things that I don’t like about the RV Superbag aside from being expensive, it does not have enough support/ cushion to smooth out the peaks and valleys of Roadtrek sofa bed cushions, it is also harder to get in and out of the bed when everything is zipped-up, and if you like tucking in under the blanket you’ll find it harder to do with the Superbag…unless you’re using the King size bag for yourself.

Dense foam and Memory foam toppers sure looks comfy, but if you plan of using the dinette every day, storing those bulky foams could be a problem in a small RV. I found this Hospitology Ultrasoft Gelled Filled Polyester Microfiber California King Mattress Pad on Amazon about 3 years ago and we've been using it since then along with our compressible Down camping blankets.

The Hospitology Mattress Pad is about 1” thick but a lot denser than Superbag cushion which helps even out the RT cushions making a softer and comfier bed to sleep in. It is a good compromise between comfort and storability. It is also easy to setup, just roll it out over the sofa bed and Voila, bed is done.

 Hospitology Ultrasoft Gelled Filled Polyester Microfiber California King Mattress Pad (72" x 84")

DIY Portable Power Station/ Jump Starter and Battery Charger with Bluetooth Stereo Speakers

Most of the parts used in this project were unused stuff and taking up garage space, the Walmart 12-volt battery was purchased last year to temporarily replace the original RT coach batteries that got fried during our summer road trip, the inverter is my old 750-watt Trip Lite Inverter/ Charger.

Obviously this is not for RV use, but can be a great power source while picnicking at the park, at the beach, etc. or just something to brag around, lol. It can also be used as a jump starter or a car battery charger. It has built-in 200-watts Bluetooth wireless stereo speakers, good for entertaining or annoying crowds at the park.

Our Gears (Part 2: Pots, Pans, Grill, Stove, and Camp Oven)

 I have put together some of our favorite RV camping gears, gadgets, and accessories. Most of our camping gears are compact by design thus minimizing storage space in the RV.  This post covers our Pots, Pans, Grill, Stove, and the Camp Oven.

Our Gears (Part 1: Camping Chairs, Table, etc.)

 I have put together some of our favorite RV camping gears, gadgets, and accessories. Most of our camping gears are compact by design thus minimizing storage space in the RV

Disclaimer: I'm not endorsing any products in this post; I'm not affiliated nor paid by any of the manufacturer to do this. I'm merely sharing camping gears and things that have worked for us, although what works for us won't necessarily work for you. 

Long Range Wi-Fi Booster Installation (Ubiquiti Bullet M2 Titanium and airGateway Combo)

Staying connected on the road is important to us, not just streaming movies or music and browsing the internet but also keeping in touch with friends and families. To make use of free public Wi-Fi's (campgrounds, public parks, Mickey-D's and other business with free Wi-Fi) a Wi-Fi booster is needed for better and reliable connection especially over long distances. Our home internet provider also provides their customers many free Wi-Fi locations and in most cases, their hotspots are fast enough for video streaming.

weBoost Drive 4G-X Cell Phone Booster Installation

 

When on the road, traveling and touring, it is always important for us to have good cell reception. An RV breakdown or an emergency in the middle of nowhere without any means of calling for help is a scary thought, but of course a cell booster will not help you in every situation- as the name implies “cell booster” means it needs an existing cell signal to boost. Sometimes a cell signal is too weak or cell tower is too distant for your cellphone to connect, this is when the booster helps. The weBoost Drive 4G-X can simultaneously boost voice and data, so you can make calls and browse the internet at the same time if your network supports it.

Leveling Your RV using Andersen 3604 Camper Leveler

I’ve used “Lego" blocks levelers for years and they work fine for leveling the RV. The last sets I had started cracking and splitting in the middle, so I started looking for a better replacement. I was searching the net when I stumbled upon the Andersen 3604 Camper leveler (Amazon Link: Click here ). Although I did not find any user reviews for a Sprinter based RV's, trailer campers swear by them as easy and simplest leveler to use, so I took the plunge and bought a pair. It is fairly expensive at about $45 a set ($90 for a pair). Another set and all 3 wheels should be cover, but for now, I'll keep using the few remaining "Lego" blocks I have for the 3rd wheel, just in case.
   

Per manufacturer, it can level anywhere from 1/2-inch all the way to 4-inches and anything in-between. The lift measures 4-inches at the very end of the leveler. It is made of tough plastic and definitely looks heavy duty.

Repurposing Your Old Smartphone for RV Use.

If you have an extra smartphone lying around and doesn't know what to do with it, this might give you an idea. I mounted one on my dashboard, loaded with some free apps, like dashcam, inclinometer for leveling the camper, etc. It can also stream music through Bluetooth connection to my dash radio.

I modified an old windshield mount for dashboard mounting as pictured below. The old windshield mount sits low and the phone camera does not clear the top of dashboard on its intended placement. The mount came with a circular plastic dashboard mounting disk with adhesive backing.

This is how it looks like mounted on dashboard.

Most Compact Portable Grill

For anyone looking for a really small grill, here it is... the Iwatani Cassette Gas Grill. I've been trying to find this here in the US for ages, it is now available on Amazon. It still shipped from Japan though, but I'm more comfortable buying through Amazon than from an unknown oversea online store. Here is the Amazon link: Iwatani Cassette Gas Grill.
  
The description from Amazon is misleading, it says "grilled skewers only", this is definitely not for skewers only, but its best use for skewered meat hence it's called "Yakitori" grill. I have tried grilling steaks, pork chops, burgers, hotdogs, veggies, etc. and it cooked nicely done.

I really like the grill because of its smaller footprint, saving a much needed storage space especially in a small class B RV's. It cooks great and evenly heats up, unlike my Coleman grill which gets really hot in the middle where the burner is located. For skewered meat, it's the best way to cook at the table while picnicking, the kids loved it.

The grill only measures about 15 x 7 3/4 x 4 3/4-inches (LxWxH). It uses an inexpensive butane canister as fuel source. One would ask, why butane? Butane don't work well in cold weather. The Iwatani grill has an ingenious metal heater plate that warms up the butane canister as it cooks, so cold weather is not an issue anymore. The heat is adjustable with the simple turn of the dial; it also has an auto igniter built in. The grid for the skewer is adjustable in 3 positions and it's easy to clean. The only thing lacking is a lid, which I don't prefer using anyway.

The Iwatani Cassette Gas Grill

I made a storage box for the grill. The box is air tight when locked to prevent the grill from smelling inside the RV when stored.