In the pre-smarthphone days one of the first mods to any Travel Trailer was a set of levels:
You got out you 4 foot level, leveled the trailer in both directions and put one on the front and one on the side for future setup and leveling.
The same concept works in the MH except you put the levels inside where the driver can see them when leveling the MH with levelers or by driving on leveling blocks.
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