I rewired my Gretsch 5120 when I replaced the original pickups and while I was doing it, I put in a bass contour instead of having the Master Volume knob. It really cleans up the boominess if I want a cleaner tone. I’ve also had it in aLes Paul, and that really helped a lot. I wish more guitars had it, but yes, we are a traditional bunch. I also think Reverend has been (justifiably) stingy with details on how their control works. Joe Gore had a helpful article in Premier Guitar, but his hand-drawn wiring diagram confused me some, and it’s taken a couple of years to see clearer diagrams being posted (which they now are). Perhaps the control will be more common in a couple of years, as more and more people mod their guitars to include it.