I know it's the pinch point in our machine, I never work the cylinder hard unless its a wad going in. More banging from the back chain than I would like, need to check the shocks to make sure they dont have a dead spot in them. New chains front and back and wore in and tensioned properly. Been thinking of getting a set of 800 radials for the front so the front may sit down a few inches and help the feederhouse angle as well, we needed new rears and put a set on back that were a bit taller and wider than factory and that helped the shaker a bit I believe. Cant wait till this fall, we switched our 6-30 corn head and planter to 8-22 last year, she handled it pretty well at 3.5 mph standard throat, hope to run a little harder and keep it full and get a cleaner sample. Thanks Gleamer