The God City Instruments (GCI) Bass Brutalist is an overdrive pedal derived from the Brutalist Jr. circuit but with component values and circuit topology tailored specifically for bass instruments. The circuit consists of two op amp gain stages and a tilt EQ inspired by the FX10.
This kit contains all necessary parts, except the pcb: Parts list
You can order the pcb form Kurt Ballou: God City DIY PCBs
Knobs for the pots are not included in the kit, you can select them yourself. The 3 pots have round 6.3mm shafts.
Here´s the build documentation:
Bass Brutalist docs