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?