I designed an active volume pedal circuit - dual buffer with isolated tuner out. Details in comments : r/guitarpedals
AaronLum.com: Volume Pedal Mod Revisited (Switchable Minimum Volume/Volume Off)
PM-1 Volume Pedal | The ORIGINAL Ernie Ball Mod
AaronLum.com: Best Volume Pedal Mods and Hacks
JHS Ernie Ball VP Jr "No Loss, Active Mod" Volume Pedal | Sweetwater
Ernie Ball VPJR Volume Pedal - Griffin Effects - Buffer Retrofit Mod Service | eBay
RM Voodoo-Vibe + - External Speed Control - Wah/Volume Pedal Mod | The Gear Page
Ernie Ball volume pedal modification to make the taper like it was with the old Allen Bradley poti | Mark Knopfler Guitar Site
Dunlop Mini Volume Tuner Mod - YouTube
JHS Ernie Ball 6180 VP Jr. Mono Volume Pedal with "Active/No Loss" Mod | Reverb
Ernie Ball volume pedal mods by Analog Man - YouTube
Shnobel Tone - The Pro Volume + Tuner Mod combines the TC Electronic Polytune 3 Tuner and the Ernie Ball Volume Pedal #volumetuner #shnobeltone | Facebook
Prentiss Effects: Ernie Ball VP (Jr) Tone Suck Mod
VPM-1 Volume Pedal Mod for Ernie Ball Volume Pedals - Zeppelin Design Labs
JHS Boss FV-30H Volume Pedal with "Active/No Loss" Mod | Reverb
Wah/Volume Pedal Mods | sonicfields.be
VPJR Buffer Retrofit Mod Serivce - Griffin Effects