Pedals that stack with the Spaceman Rumblefuzz II

Cordovox PH-8

Run Cordovox PH-8 after Spaceman Rumblefuzz II in the signal chain, clear of Spaceman Rumblefuzz II's own gain stage

Death By Audio Octave Clang

Run fuzzy into Death By Audio Octave Clang for more octave on top

Paul Cochrane Timmy

Put Paul Cochrane Timmy in front and the fuzzy tone leans further toward clean boost

Strymon OB.1 Bass

Strymon OB.1 Bass leans toward clean boost, and that's a real, usable character to pair with

Walrus Audio Melee Wall of Noise Black

Put Walrus Audio Melee Wall of Noise Black after Spaceman Rumblefuzz II in the signal chain, clear of Spaceman Rumblefuzz II's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Walrus Audio Mako D1 High-Fidelity Stereo Delay V1

Keep Walrus Audio Mako D1 High-Fidelity Stereo Delay V1 after Spaceman Rumblefuzz II in the signal chain, clear of Spaceman Rumblefuzz II's own gain stage — goes in the amp's FX loop (or last, into a clean amp)