If you have a smart phone, I use the app Army Knife for Android which has a bubble level function. Just lay the phone on a flat surface such as the counter and move the level legs until the bubble is in the middle. Then you can set that as the "auto" position.
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Ron & Donna Aikins - Palm Desert, CA
2006 Fleetwood Pace Arrow 37C, Workhorse W22
Acme EZE Tow Dolly - 2013 Lexus ES 300h
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