We've managed a work-around strategy for dealing with controller mosfets and now have the 25A and 30A controllers in stock again, and the 20 and 40A coming shortly. All of our controllers now work both sensored and sensorless, and have a jumper cable to select between two levels of regen intensity depending on what you or your batteries want. Not only that, they will automatically map the hall sensors so that there is no need to mess around via trial and error to figure out the correct pinout with a given motor. The full details will soon be explained on the controller store page.