Sorry, not Jim Chambers but Ron Scott. I think Jim is teaching his six day lock assembly class.
National Muzzle Loading Rifle's Summer Gun Building Seminar held at Western Kentucky University, Bowling Green, KY. You can call them to see if there's any openings left. Instructor is famed rifle builder from Oregon, Ron Scott.
Tuition cost is slightly over $1k plus $1050 material fee for me because of the 2nd smoothbore barrel. Then there's housing and your own food expense. Class is 9 days long and runs from May 31-June 8 (or so). Afterward most of us are headed up to Friendship, IN for the National Match (muzzle loading) and a lot of fun. Call Brenda at the NMLRA: 812-667-5131