Adding to the helpful comments above, on replacing the 1.1mm tripoint screw, I found the the magnetism of the nearby speaker coil overcame that of the driver and would draw the screw away or the combo of forces would fling it out of the work area! After fiddling with it for too long, I used some of the battery adhesive removed earlier to attached the screw to the driver. Wax would probably work better if I’d had some.