Revised. I’ve recently refurbished a No. 4. When the roller carriage is in contact with the ink drum (hence the form roller clutch is engaged), there’s an awful squeaking sound. The front rider roller does roll, and the oscillating roller seems sort of sluggish. It’s difficult to gauge where the sound is coming from, but I think its either the form roller pins on the clutch plate or the front rider roller on the front form roller. This happens with or without ink. I’ve greased, oiled, or added graphite to everything. Any thoughts?