For me it doesn't seem to be so much how level it is but how well the 4 corners are aligned. If I get a little too aggressive with the cordless drill while putting down the stab jacks I can get one corner a little higher (or more accurately, out of plane with the other 3 corners) and it seems to flex the frame slightly and we will have trouble with the b'room door latching.
If I take a little care when lowering the stab's we have no probs. Never had a problem when it's just sitting on the tongue jack and wheels.
2013 F-350 CC SB 2WD 6.7PS
2013 Eagle Premier 351 RLTS
-SOLD- 2012 X23B
-SOLD- 2003 Ford Expedition 5.4, Bilstein shocks