Picked up a 913D2 9.5 today from the local shop.   Noticed that there is a rattle in the head?   Took off the shaft and back weight and noticed what looks like dust from machining in the head -- a very fine powder?!?  Put everything back together and tightened all of the screws.  I can still here a fine material swishing around in the head.  Is there anyway to get rid of this?   Has anybody else experienced this?