I always found it tedious to find the exact right size screw when building with Vex's instructions, or even when building from scratch. I needed a quick, portable tool to help me size screws. And that is what this is. Print is with or without a multicolor. If you don't have a multicolor, pause at the very start of layer 41 (or the end of layer 40), then change filaments.

recommended settings:

raft:

no

supports:

no

layer height:

0.2

infill:

at least 10%

filament:

PLA, but any filament works