[GATE PTX] Double trigger stopper

For GATE PTX (and maybe other guns) that allow for double trigger configuration, this is a stopper so when you push to the stop, it shoots semi, and if you keep pushing it shoots auto. Use TPU 95A, 0.4 nozzle, disable infill and make it 2 walls (or more/less depending on how hard you want the full auto), side print and with auto supports with 0.2 Z axis support spacing. To install it you have to make a cut in the base, put it in the gun and then glue the base that you cut (or solder it, I soldered it actually). Being TPU is very easy to uninstall when you want. And then obviously configure the double action to the thresholds that you feel better. Video: https://youtu.be/kFNODtXHSQs