I dont have any tips for you, but I can share two of my gripes:
The MicroStick switch is 20x1
threaded. As a test Ive tried to screw on my GP Paps v3 top cap and switch and neither will screw in very far. GP
threading is widely known to have excellent tolerances and although I didnt expect either to work functionally, I think it illustrative of the poor tolerances on the MicroStick button threading. I tried the MicroStick button on a GP Paps v3 tube and I can tell that its a loose fit. Im not aware of any alternative switches that you can use with the MicroStick, but I would be wary of the tolerances and compatibility.
Im not sure why the MicroStick button uses a SS contact I cant think of any
mods produced today that still have SS contacts. Im waiting for delivery of some replacement brass screws that I bought on eBay to see if they improve the voltage drop that Im experiencing.