A couple of months back, I took off the gear racks, one side at a time and cleaned off 40 years of ink, grime and paper dust. All are back on in exactly the same position and tightened down with hex head screws. Nothing was dis-assembled from the roller carriage. Now, when the carriage in on impression and not tripped off impression, (the other lever), there is an space of 1/8″ between impression cylinder and type-high. Anyone have any ideas what may be wrong? This press is in a college setting and has been used since I worked on it.