I made one last week and like you say it is an interesting project. I had never heat treated metal before and I hadn't used the boring tool very much so both proved neat to do. I haven't used the tool yet and so I don't know if my heat treating was done properly, however I followed mrpete's instruction videos as closely as I could. Learned an awful lot from his videos. Never had any formal training in metal working, but, he can explain things very well.
NodakGary
NodakGary