just wondering with my 450, there is excessive play in the blade movement ie, holding one blade still the other can be moved at least 2 inches all around and this isnt the blade moving in the grip, now my real question is, is this most likely because the actual blade grips are damaged or the feathering shaft is a slight to long and i could put some more tiny washers on the outer side of the thrust bearings, or is it the actaul head part, i know people describe it as butter steel/alloy but as i couldnt remember how much play it used to have i thought people may have experiance this or confirm it is the blade grips. i have them bolts into the feathering shaft well locktighted as i am worried the blades might come off but i will be able to get them undone. hopefully i have provided eunough accurate information for people to understand my situation, if anyone could provide some knowledge/ideas it would be very much appreciated, thanks doug