Heres a few things i learned. The set screws for the trigger are magnetic but don't attract to the metal bracket that actuates the microswitch (hint hint). The microswitch is planted firmly on the circuit board, maybe soldered? The switch is manufactured by Cherry Electrical Products ( www.cherry.de
). These letters and numbers are written on the other side; DG13A 125VAC 080BT
T852A. 30VDC and two symbols that look like backward RU. Thats all the info I could find without takin the switch apart.