I can’t speak on their behalf, but I can say that my preference is to have the volume pedal control both sides. Volume swells with my feet just feel most natural to me.Haven't dipped my toe into wet/dry/wet but when i ran a wet/dry it was always:
Guitar > Drives > into dry. and wet side (with modulations,etc.)
The drives were always in the signal path of either side.
Your revised diagram seems on point - i do have a comment regarding the volume pedal in that diagram:
the way its wired, the VP would control all volume - if you isolated the volume pedal to just the two WET sides you could swell in / dial out your wet sides without losing the DRY center channel. You would still have the mute from the Switcher and guitar volume knobs as the "master"
Hi, I use a WDW rig - I add some of the dry sound to the wet cabs also, via mixer. I think it sounds a bit fuller than 100% wet. The amount of dry varies, 30-50% I would say. Also I noticed when you add dry to the wet cabs, the wet cab sound becomes more important. My outside cabs are very boomy (changing soon), so mixing in too much dry made the sound too boomy and flubby. I have to use extra eq to dial it down. With better cabs, should work nicely and keep it tight, not to overpower the center cab.
Think of the old w/d/w rigs of EVH, Luke, Landau etc as a plain old stereo rig, with an additional dry cab added. Because that's what they were.
I still use two 1x12 Bogner Cubes for my Left and Right wet cabs and a 412 for the center dry. If a wet effect is on, it only broadcasts the wet signal. If the effect is off, the dry signal is sent to the left and right cabs. I have tried sending a mix of wet and dry to the wet cabs against just sending wet only. I didn't find that it made that much difference unless you really wanted a pronounced wet outside the dry.Personally, if I was going for a W/D/W rig where the Wet cabs were true 100% Wet only cabs, I couldn't justify anything more than a 1x12 cab per side no matter how big the gig. Seems like a total waste to devote two whole 4x12 cabs or even two 2x12 cabs to reverb and delay trails and/or pitch shifting only.
If I ran Dry signal into the Wet cabs though, sky's the limit.