I am absolutely puzzled. My PW800+ and auto drive was working perfectly. I loaded a couple thousand of shells and decided to switch from 1 oz to 7/8 oz. So I switched the shot bushing. Had a little trouble getting the rack to move forward enough to remove the bushing but got it changed. The only thing I changed was from AA HS hulls to Rem Nitro, and changed the shot bushing. The machine runs fine UNTIL each shell holder is full, and the plate gets to the final crimp station. Then all of the sudden it does not cycle all the way up and the clutch on the auto drive initiates. I have emptied the machine, cleaned, and ran empty. Seems fine! Start up with a new round and all is well UNTIL the final stage again, then the machine doesn't cycle again. Anyone experience this? My next step I may try removing the auto drive arm and try using the manual arm and see what happens.