For the floor to not influence your measurements consider changing to three points of contact instead of four. Shouldn't be a problem in camber because of the pivot point of the upright, but caster could have some weird influence from the floor not being perfectly flat and level relative to all for corners. Then again it's just a tape measure alignment and not a precision machine looking to be within 0.001".
@@3rdGenGuy Good to know! I was considering buying this set but you should be able to do the corner balance if you buy level scale stands. Well that's from what I've read.
