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There is no provision to enter the dimensions of the rig in the leveler. The LogicMatePro has this ability along with the Kohree RV Leveler, which I will be releasing a video about next week.

These levelers all use an accelerometer, which is an industry standard integrated circuit. So this is pretty much a generic off-the-shelf function for this type of circuit. I actually designed and built a leveler using an accelerometer as well for RV-Project a few years ago. But the display was different for mine as it used a 9 addressable LED display that showed the level from the cab of the tow vehicle. It actually worked well, but the display would only last a few months before the display LEDs went bad. It was an environmental issue and after 2yrs of trying everything from potting compound to TVS diodes to keep the LEDs from going bad - I ended up abandoning the project. The issue was the LEDs were not up to the task, and I was never ever able to find a good replacement. Someday I would like to dust the project off the shelf and try it again. But my point is that I used an accellerometer which was specifically designed for the leveler function. Accellerometers are found in your cell phone and those digital levelers that are popular today. There are dozens of cellphone apps such as "bubble level" that you can download, which are really not much different than the stand alone levelers. I will be doing a shootout video of three different levelers. The video is completed and on the schedule. You might find it interesting.

Again.

The advantage of these levelers, and the way I typically use it is when I get to the campsite, I move the rig forward or reverse, or left or right a bit to find the most level spot before unhooking the trailer. I can't do that with a carpenter's level.

Either that or join a Facebook group. Always people in them that like to help.

I have a video in the queue that I am calling a leveler shootout, where I compare three different levelers. Without letting the cat out of the bag, I do discuss the support structure of the levelers as well as the accuracy (they accuracy is somewhat different). The video will be released in a few weeks.