AlanH183

I don't understand why the need for an expensive swivel air fitting that you then lock into one fixed position. Wouldn't a simple 90 degree elbow work just as well and be much cheaper? And how did you cope with the hexagon on the female to female brass "axle"? Doesn't it rub on the plywood? So a straight pipe would be better - correct?

DON'T use pliers to pull the string pegs out of the bridge. This will easily cause the peg or the bridge to be marked. The end of the tuning crank is slotted to fit under the peg and then just pry up on the crank to lift the peg out.

Check the Youtube videos from Martin about how to put the new string through the tuning machine. Their method will prevent the string from ever slipping out.

Or... convert a cheap "wood only" 9" bandsaw to cut steel: https://www.youtube.com/watch?v=NIjzaDHslMs&t=30s

Your calculations are inaccurate. You need to determine the impedance of the coil, not the resistance. I appears that you are using AC to power the foundry (you don't actually say so) so it is impedance that determines the current flow, not resistance.

Yes, I am happy yo do this. I am not very good at 3D CAD, but I will share what I have. Where is the best place to share files on here?