Pedals that stack with the PastFx Deluxe Elastic Mattress Flanger

Tech 21 SansAmp

Tech 21 SansAmp leans toward analog warmth, and that's a real, usable character to pair with

Univox Super-Fuzz

Univox Super-Fuzz leans toward octave, and that's a real, usable character to pair with

Maxon AD-9 Pro Analog Delay

Maxon AD-9 Pro Analog Delay's analog warmth voice goes after PastFx Deluxe Elastic Mattress Flanger in the signal chain — it's not there to compete with PastFx Deluxe Elastic Mattress Flanger's own modulated character — goes in the amp's FX loop (or last, into a clean amp)

Meris LVX Delay

Put Meris LVX Delay after PastFx Deluxe Elastic Mattress Flanger in the signal chain, clear of PastFx Deluxe Elastic Mattress Flanger's own gain stage — goes in the amp's FX loop (or last, into a clean amp)