TRACK & BALANCE
They have a real good procedure in the maintenance manual starting with using trim tab adjustments for removing stick shake-but you have to have a stable A/C on the ground firstly. That's wy friction is so impotant. I have been to the enstrom course with Lee Berdue I guess he forgot to mention this procedure, had to figure it out on my own. Different size shims (.001 thou on up to .020 I believe)can be purchased(cheap to get) combinations of these shims are fitted behind the DU washers to get the proper grip close tolerance fit, then when you start clamping the grip it will have a nice friction to it. Rule of thumb would be the grip should just remain in the full flapping position while blades are off. I can walk you through all the steps if you like and chances are, you probably won't need a stobex .Good luck with it all.