After years of leveling MH and campers, I've gotten to the point of almost knowing when it's level, especially in our MH. I open the bathroom door and when it doesn't swing one way or the other, It's level. I've tried this so many times I can't remember. I've checked it time and time abain and now seldom ever check. That door will move with the slightest out of alinement. Try it for yourself and see. At least it works for me. may not for you. Got up 1 AM and the door wouldn't stay in posistion, check the level, sure enough out of kilter, one jack had sunk in the ground a bit. I forgot to place a pad under jack and ground was a wee bit soft. Good luck and happy motoring.