Would it be possible to get just 2 arbors say .840 and 845 for the finish and put an insert into each one for your thread size say 3/8 x10 and just use these. For the butt you can thread it on and sand either size and for the shaft you can put a pin through it and thread it into the shaft and do the same sanding. These things are so fricken expensive that this might be the only way I can affort a set. I have prices quoted for each of those sizes , 70.00 for 1/2 inch carbide and 85.00 for 3/4 inch carbide with a 1/2 inch ID. Some thought would be appreciated. Thanks.
Mark
Mark