Optional? I'm assuming using paper and superglue isn't a common practice for most table mechanics, or do you prefer doing it that way? When you say, paper, I'm thinking something like a few pieces of a manilla envelope, and slow-drying super glue.
So are the threads the same, the same depth for the joint pin, and the shaft bore depth? The reason I'm asking, my radial shafts aren't interchangeable, one is about 1/4"-5/16" short of a face-to-face connection.