I agree. I've got outside bubble levels that I use to ball park it in----but also use level on the floor in both directions and will often check on top of the fridge. I sometimes re-check after I put the stabalizers down and if it is off I may back off on one of the stabalizers as,has been mentioned, as that can throw the door off. usually on a a graded campground pad I figure two orange plastic squares under the low side gets me where I need to be side to side----then I check fore and aft with the floor level.

Rick

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2201 TL

2010 Nissan Titan king cab SE
4x4