EDM possibilities for gun rebuilding

[miniman82]

I received a pair of books from Ben Fleming, detailing how to build EDM machines at home. These are relatively low power machines, but would be suitable for cathode retainer removal. There are 2 flavors: capacitive and pulse. Either one should work fairly well, the difficult part would be building a ram with tight enough tolerance. Stepper based high accuracy ones can be found on the open market, but the cost is a little high.