Here was a little job i just finished to use on my SBL when i make plumb bobs. Now i can hold the tail of the bob while i work on the body. Its just a #2MT shaft turned with a boss to hold a 608Z ball bearing...Bob
I have been selling some plumb bobs on ebay. There are about a million different styles. I still use one everyday as a pipe welder to get centerlines of 16" and 20" pipe. Yup your idea will work for the handles...Bob