dulcimer thing is lots of fun. My finger's been hurting a lot lately, so I haven't been playing much, but I did finally get around to fabricating a machine tuner after a big bass string torqued one of my wood tuning pegs apart.
The screw was turned using auto feed on a SB heavy 10 lathe. The aluminum chunks and the gear were milled on a bridgeport using an end mill and a slitting saw respectively. The gear was supposed to be press-fit, but it was loose even after epoxy. I cut a slit in the shaft with a hacksaw and drove a wedge in while hot. Now it holds. Also, I got lazy about making a knob on the tuner, so I just heated and flattened the end of the screw shaft with a hammer. You'll see in a later picture that the steel peg slides through a brass sleeve in the peghead so that it doesn't damage the wood.
Hopefully I'll turn out more, perhaps more functional versions of this in future.