allen key is a 1.5 mm
Got the ends off but cannot in any way budge the pcb board out of the case.
It seems seated/jammed in the thin channels of the case on either side and even though I can pry the board slightly up and down ( carefully ) there is zero budging this thing. I will have to resort to pressing it out somehow with a vise maybe. You must have been one of the lucky ones with a narrower board.