maxflex540, I really find it hard to understand why it would be proper to tighten the drumstick bushings at the end of the stroke vs in the middle. Anybody else care to chime in on this issue? 

 I would pretty much echo all the other advice on the shaker system. I bought a 2700 hr. 2388 last fall and spent a LOT of time redoing a lot of it. Ended up putting in a plastic sieve chaffer which is MUCH lighter. Took me awhile to trace down all the various reasons for a "bumping" cleaning system. My final "test" is to feel each shaker arm and pivot point that can be "safely" touched and do it at an idle all the way up to operating speed. You must be very careful and cognizant  of where every finger is as I did lose a little skin on 1 finger.