My UM2 is not happy :(
I've managed to fry the stepper driver for the Y-Axis. Pretty clear case, the PCB is charred where the magic smoke escaped from the chip.
There is an unused axis for a second extruder (E2) on the board...
I've quickly looked at the code, It looks like I could just swap the STEP_PIN, DIR_PIN, and ENABLE_PIN entries in pins.h for MOTHERBOARD==72 (STOP_PIN should probably remain the same, I guess thats the end-switch). I'd rather not use a custom compiled firmware, but its cheaper than a replacement board.
I'd appreciate if someone more familiar with Marlin could tell