When dialing in floating bridges I always dive the bar and let it return to neutral to set my zero that way, and I don't put the guitar on a tech bench when tuning the bridge at all either. The more properly dialed in/balanced your bridge is the less this happens and more acute the angle of neutral, or knife edges could be worn out but that's pretty uncommon from proper use even on the 1000s.
IME it's very difficult to get a guitar that will unfailingly return to within more than 3 cents or so when really giving the bar hell. If that's what you are hunting it's a pipe dream. Tilting the guitar can put the bridge off by up to ~6-12 cents in some cases as well. Might not explain your problem, but FWIW.
IME it's very difficult to get a guitar that will unfailingly return to within more than 3 cents or so when really giving the bar hell. If that's what you are hunting it's a pipe dream. Tilting the guitar can put the bridge off by up to ~6-12 cents in some cases as well. Might not explain your problem, but FWIW.