Voodoo Lab

I have 2 pedal switchers and a commander in my rig as well as pedals by various makers. I own a Red Witch phaser which is an incredible pedal. However, when it is in a pedal switcher loop I lose about half the volume when engaged but it passes the signal at full volume when the loop is on but the pe...

Changing tubes is easy enough but I was curious about the relationship between v1-v4 and the channels on the preamp. If I like the clean channel but wanted hotter tubes on the lead channel, which valve or valves should I change? Any suggestions on brand or type? Can other Similar tube types be subst...