I've got the 45mm and 48mm CF's on order. Meanwhile I picked up an X645 to try my hand at prop prep. Problem is no one in town has a balancer for me to purchase. I started cleaning it up last night and polished it, too. I know it's out of balance, though. I was think about cutting a 3/16 drill bit off to use the shank for a balnce shaft and setting it up on the top of a pair of razor blades mounted to a block. Might get me in the ballpark at least.