How long should a lift cylinder last my press is going on 8 years now, the other day we had a full press all six heads printing and I notice the table drop just a little once the squeegee came down and then move back up a little, didn't seem to have any effect on the print that I could tell. Today with only two heads printing table up and steady no drop at all..I checked and listen for air leaks noting, no leaks around the lift cylinder either, so I'm guessing the lift cylinder might be going bad under a heavy print load? something is telling me to go ahead and get a lift cylinder in here for a backup.