Cheap, Fast Hex Wrenches (Customizer)
I needed super-fast printing and cheap flat wrenches to include in my DIY eurorack module kits. The customizers out there were "too nice", so I stripped this down to the bare minimum of features. It takes about 5 mins to print one.
I've included an 8mm wrench (good for "thonkiconn" audio connectors) and a 10mm wrench (good for the vertical pots used in eurorack).