John, When removing and installing rotors in combines we always leave stop sign on cylinder and using a skidloader with forks or a forklift, position forks together with about a 4" gap between them and enter forks through access cover in stop sign far enough to catch first star on cylinder. Stop sign is used as a fulcrum and you can easily tip and raise cylinder as needed for removal and installation. When installing you will need a second person to line coupling up as rotor is inserted back in combine. As skidloader_forklift operator moves cylinder back into postion he will go forward until rotor touches gearbox drive shaft and then second person using two pry bars lines up cylinder and coupling with skidloader_forklift operator appling light pressure on rotor.Getting stop sign lined up on Series 2 machines requires a spacer block to get the bolt holes to line up for that last 1". If you do not have access to a forklift_skidloader or you have removed the stop sign then as mentioned you could lower concave down and slide rotor into place and then raise concave to line up rotor and coupling. This takes a little more time as you may still need a skidloader or forklift to raise discharge end of cylinder to push into place. Customer bet us that we couldn't remove and install a rotor in less than 1_2 hour. So he timed us at 9 mins. out and 11 mins back in. Gleaner has by far one of the easiest and quickest ways to remove rotor from combine. Good luck with your project. Hyper Harvest II