Pedals that stack with the Spaceman Nebula (Gloss Steel)

Univox Uni-Vibe

Keep Spaceman Nebula (Gloss Steel)'s octave voice out front: Univox Uni-Vibe goes after Spaceman Nebula (Gloss Steel) in the signal chain so its modulated voice doesn't muddy it

Walrus Audio Ages

Put Walrus Audio Ages in front and the fuzzy tone leans further toward clean boost

Aguilar Octamizer (Bass Octaver)

Aguilar Octamizer (Bass Octaver) layers octave onto an already fuzzy signal

Pigtronix Echolution

Put Pigtronix Echolution after Spaceman Nebula (Gloss Steel) in the signal chain, clear of Spaceman Nebula (Gloss Steel)'s own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Walrus Audio Melee Wall of Noise Black

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

Aphex Punch Factory Compressor

Run the Punch Factory's optical compression ahead of Nebula for even attack before the experimental octave fuzz reacts.