da Rock

Yes you are correct, and I have actually done this many times. I guess I didn't take the time in my first post to be as precise as I should have been. The actual problem is that the hole that passes all the way through the hub is the non precision hole. The precision "surface" is the larger hole on the front of the hub, which only enters maybe one third of the way into the hub. If I put the balancer cone on the back portion it will engage the non precision hole. Now if I reverse this, and I put the flat face of the cone against the back of the hub, and the cone into the front of the hub, I still have this problem. The cone will pass through the precision hole without touching it, and still engage the front portion of the non precision hole. There seems to be no way to center the balancer on the precision hole, short of turning my own adaptor on a lathe. Sorry about the long harangue, hope this makes more sense.

Lm