Hello, I bought a cheap wood lathe to get started on some projects I have always wanted to do. It is a 14X40 lathe and I have turned bats, bowls, and turkey calls on it so far. I wanted to try my hand at pens next. My spindle seems to be a step down rather than a Morse taper. Pictures attached. It seems to measure 11/16 at the threads, same in the middle then step down to 5/8 and then down to 1/2. I would like to find an adapter that has a more versatile thread size for chucks and pen mandrels but have had no luck. I supposed I could try my hand at turning the pens without a mandrel. Does anyone have any suggestions? Thanks!