[Robert Dip]

I solved this problem many years ago when trying to get wheels balanced that did not fit on any of the standard machines. K-H wires are also problematic since you have to use the bolt pattern to center.
I used a '40 spindle, modified drums to get a 4 1/2" BC, another for a 4 3/4" BC, stock drum for the 5 1/2" BC. Opps, almost forgot...have a wide five drum for my '39. Made sure the wheel bearings were good as new, apply light oil, balance the drums with weights till it did not 'bottom out'...that is when spun, it stopped anywhere. When out of balance, heavy part goes to the bottom, naturally. Now that the drum is balanced, mount the wheel/tire and repeat the proceedure by taping weights on the rim edge. Proof is in the pudding.....works great and every time. Now, you may not want to go to all this trouble, but if you work on many different projects and over a longer period of time....sure saves a lot of grief. This is 'ole school' and not for 'techies'.......Robert