Today...since I can't leave well enough alone...
12 mosfets in controller. Good stuff. 63V rather small capacitors, not so grand, but not really an issue either. Thankfully, right there when you open it up, the shunt...
Add a couple of wires...
Run them out of the case, and add an insulated paperclip between 'em...
And you have a "shunt-mod" that you don't have to open the case and re-solder to adjust the resistance!