Paper resistance is imbalanced during calibration

[cliffyk]

In pondering the Z-Axis adjustment/calibration "paper resistance" thing it has occurred to me that any significant resistance--other than to be expected slight static resistance ("stiction")--to pulling out the paper would have to be an effect of the paper being "pinched" between the LCD and platen--I.e. "too tight'.

The OEM FEP is 0.15 mm thick, normal 20# printer/copy paper is 0.10 mm, a poor substitute. Way back I began using a sheet of 24 # parchment of 0.14" as a spacer ans have generally ignored the whole "pill out resistance" thing--just make sure you hols the platen down evenly and gently, and snug up (as previously defined) the clamp screws.