Re: Current formula. That formula is for MAX current geared to the size of the electrode to speed production. It is not required to run at MAX current.
You are better off running at LESS than max current to get smaller particle size, I have a 1 ounce bar and I am only using 2 milliamps on my Silvertron Elite generator. A 1 oz bar allows me to use 15 milliamps for max speed. I just finished another gallon today that took 24 hours at 2 milliamps, but this batch is PERFECT. The laser light can barely be seen in a dark room, yet it is 20ppm. I am thrilled with the Elite.