[ProfessorM]

Here is probably the most critical aspect of the holder. The cutting tool and the follower point must be the same distance out from the holder, up and down. You can do this with a square. Push the follower and the tool out till the are both the same. You will need to make it so the tool bit and the follower are both adjustable, in and out, then lock them in place. When you make your tool holder you must make it so the cutting tool is on center. You need to mount your plate first. Then get a measurement from the bottom of the plate to the centerline of the lathe. I did this by measureing up to the tailstock center's point. Then compensate for the size tool you are going to use. That is why I made the tool holder's tool groove at an angle so you can adjust the tool out and it goes up too so you can get it centered. You lock in the cutting tool on center and then you bring out the follower point to the same distance and lock.