We have a No 4 (S/N 8655) that seems to take more effort lately to return the carriage to its resting position at the feed table. There is no problem leaving the feed table in trip or in print. Returning to the feed table seems fine in both trip and after printing an image until it gets to the position just before ‘locking’ into the resting position. This happens just after the grippers rise on the return. If I increase the speed at which I return the carriage, it settles into the resting position, but with considerable force and noise. If I return the carriage at a slower speed, I actually use both hands to finish the return. Is this most likely related to the trip-print mechanism or with the gripper mechanism? Any suggestions on how best to diagnose and fix the problem?