Marvin asked in another thread that I post here as I begin working with my millimg machine. Well, I finally got it squared up to acceptable tolerances, so started working on a jig for my inserts. I decided to do it differently than Fred's. I plan to surface the toneboard and mill the tonechannel before final turning, so my jig will have a 1-1/8" channel for inserting the insert blank, which I'll hold in place with setscrews.
I'm using a piece of 2x2 aluminum (6061). First task was to cut a 4" section.
Then I put it on the mill to machine the ends square.
Then I started a hole on either end with a center drill, then drilled it through on the mill with a 3/4" drill bit, then started boring out the hole with a boring bar. It is 1-1/16" now about 3/4 of the way through (will have to flip the block and finish from the other end once I get it to 1-1/8").
I may get a little more done tomorrow, but if not it will probably be next weekend before another update.