I’m working on the rebuild of my (previously) dismantled SP-20 and I’m finally ready to test the impression. After calculating the correct amount of packing for a .019″ sheet (.024) on a cylinder with an undercut of 040 I proceeded to attempt a blind proof. There was nothing, not even when I added another .006 packing. Upon closer inspection, the cylinder bearers are not in contact with the bed bearers by about 3pts or .0417″. When I put the press into trip, that distance increases further. So far, I can’t seem too close the gap by adjusting the carriage bearings that ride the under rails or any of the bearings for that matter. I’m not as familiar with the SP series, but I would imagine that the cylinder bearers are supposed to touch the bed bearers. Of note, the trip plungers are working and retract when switched to print mode, so I don’t think that’s the issue. Thoughts on what would lift the cylinder out of contact with the bed bearers?