To make this project we need the 3D printed part. I’ve made the design quite fast since I don’t need it to be perfect or very good looking. All I want is to work. Inside these 3 parts I will put the electronics, the motor and the gears. These other two parts are just the piston and the support for the push buttons. I’ve printed these with 2 perimeters, 20% infill, a 0.4mm nozzle and 0.2mm layer height. The material is pearl white PLA. I’ve also made sure the holes are the correct size using a M3 drill. Also check if you can fit the solder paste syringe.