The trigger on my X52 pro was stuck and wouldn't release unless I pressed it again hard and quick.
Followed guide, opened it up, reseated the metal flap over the button and sealed it up again. Worked great!
I didn't want to risk damaging the pinky button so I unscrewed it from the joystick. A bit of a pain to reconnect when I was done due to awkward angles but still recommended as it didn't risk damage from pulling on the wires. Also the screws in the side of the joystick are deep, a socket screwdriver will be very unlikely able to reach deep enough to get that screw out! Also some pieces are want to jump out when you crack it open, work over a large mat or sheet so you can find the pieces that spring loose!