Pedals that stack with the Caline CP-31 Hot Spice Wah/Volume

Soldano SLO

Soldano SLO leans toward high gain, and that's a real, usable character to pair with

Sola Sound Tone Bender MkII

Sola Sound Tone Bender MkII's own germanium character is the real reason this is worth trying

Free the Tone Future Factory FY-1

Keep Free the Tone Future Factory FY-1 after Caline CP-31 Hot Spice Wah/Volume in the signal chain, clear of Caline CP-31 Hot Spice Wah/Volume's own gain stage — goes in the amp's FX loop (or last, into a clean amp)

Boss DD-500 Digital Delay

Boss DD-500 Digital Delay's shimmer voice goes after Caline CP-31 Hot Spice Wah/Volume in the signal chain — it's not there to compete with Caline CP-31 Hot Spice Wah/Volume's own modulated character — goes in the amp's FX loop (or last, into a clean amp)