Pedals that stack with the Spaceman Delta II Cadet: Harmonic Tremolo

Catalinbread SFT

Where this leans bright, Catalinbread SFT answers back warm

One Control Lingonberry Overdrive

One Control Lingonberry Overdrive's warm balances out the bright tone

Dunlop Echoplex All-Analog Dry Path Delay

Dunlop Echoplex All-Analog Dry Path Delay's warm voice goes after Spaceman Delta II Cadet: Harmonic Tremolo in the signal chain — it's not there to compete with Spaceman Delta II Cadet: Harmonic Tremolo's own harmonically rich character — goes in the amp's FX loop (or last, into a clean amp)

Line 6 DL4 Delay Modeler

Keep Line 6 DL4 Delay Modeler after Spaceman Delta II Cadet: Harmonic Tremolo in the signal chain, clear of Spaceman Delta II Cadet: Harmonic Tremolo's own gain stage — goes in the amp's FX loop (or last, into a clean amp)