I made one of these for myself and while I was at it I made a couple more in case I messed up. My first one was a success and now I don't need the other two.
I'm wanting to sell the other two for 30.00 each including shipping. I'll include two inserts the screw to hold the inserts and a ferrule. The shaft is turned round 2 1/2 inches long at the bottom and the tip is tapped for the screw. You might need to do some light grinding on the underside of the tip to make some clearance.
If your interested just send me a PM