Tell us about yourself!
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?
Angular Bluetooth SpeakerView Instructable »
Metal Bender Vice Jaws