You have to have the A60 adaptor to use the CK1, CK2, CK3, CK8, etc with the C460 body. If your diligent, you can find CK63's. If you were going the CK3 route, I probably wouldn't jump until you had a line on some A60's. Hard to find as well. FollowinBob here on TS is a machinist and does make a run of an A60 clones on occasion.