Pedals that stack with the Real McCoy Custom RMC4 Wah

Fjord Fuzz Odin

Fjord Fuzz Odin stacks fuzzy on top of the mid-forward already here

Cusack Music Tap-A-Fuzz

Cusack Music Tap-A-Fuzz layers fuzzy onto an already mid-forward signal

Walrus Audio Mako D1 High-Fidelity Stereo Delay V1

Run Walrus Audio Mako D1 High-Fidelity Stereo Delay V1 after Real McCoy Custom RMC4 Wah in the signal chain, clear of Real McCoy Custom RMC4 Wah's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Electro-Harmonix Canyon

Put Electro-Harmonix Canyon after Real McCoy Custom RMC4 Wah in the signal chain, clear of Real McCoy Custom RMC4 Wah's own gain stage — goes in the amp's FX loop (or last, into a clean amp)