A lot I have seen throw themselves way off by not leveling at the same general temp range. One time they will level at 90degrees, then they will get lazy and decide to check the leveling with the machine cold. When they level cold it throws the leveling off. Then when they start a print they heat it up and it is all out of whack.
There are several nyloc style leveling nuts out there. Here is mine.
http://www.thingiverse.com/thing:353353
New member with print issue
Yesterday, 08:57 AM in Tips, Tricks and Tech Help