Don't forget knobs!
If I won the lottery and could go on a pedal building bender - these are what I would be thinking about for bass...
PCPB
Frequency interchange - awesome sounding high pass/low pass -made one
Drebbel Bass Preamp/EQ - clone of Southampton Pedals Ictineo Preamp/EQ
Capsize Preamp - Broughton Fliptop
Mofeta Preamp is EAE modelFet - I think you have the real thing?
Scabbard Overdrive - EAE dagger
Byzantium Flanger - BF2
Chop shop -Barbershop, made one, you have to use the right spec J201 for the circuit so not sure about Musikding kits for this. SS/BS mini is similar and IMO better.
Curds and Whey Distortion - prunes and custard ... made a load of these on my own PCB, love it!
Fornicus Overdrive - SS/BS f- overdrive
Obsidius Preamp - DG B3k
Simulcast or duocast- hudsonbroadcast
Parentheses Mini Fuzz - EQD life
Desolate Fuzz - Fairfield unpleasant surprise
CheeseMonger Fuzz - love tone big cheese - I built the Aion version...
Kewpie Fuzz - Japanese muff varient - probably build one this year
Nein Fuzz - Fairfield 900
Phase II/ Duo-Phase - mutron phasers
Deflector Reverb - EQD afterneath
AION
Quartz Optical Compressor - Diamond compressor
Spectron - Meatball
TS-50 bass preamp
Acoustic 360 bass preamp
Binary - DG duiality
Lab series L4 bass preamp - Pearce sounding thing, it's good, but cheaper to buy mine I'm selling!
Neurotron - Lovetone ring stinger
Quadratron - Lovetone doppleganger
Xenotron - flange with no name
Conspiracy to Commit Electronics (sushi box's diy stuff)
Bassdude - fender bassman
Nobelium - Nobel preamp
Particle Accelerator - F2B preamp.
Delyk - Up down daddy - Pearl OC7 octave
Electric druid - Flangelicious
Parasit for drunken guitar synth stuff
No PCB that can be bothered to find... but schematics ...
Phat Phuk B
JPTR Jive/SHO
Brassmaster