OK I'm using this weekend to do a bit more planning. Noting the enthusiasm about NFB mods for the PR at Fenderguru, I've ID'd the NFB resistor, 2700K across the top of the schematic, attached, and I figure I could simply test 'NFB off' with alligator clip bypass. If it matters, my initial build is (on purpose) keeping the wimpy stock PT and OT, but (likely) incorporating a mids or mids / raw (tone stack suppressing) pot. Questions (answer any or all as you see fit): 1. Is NFB a worthwhile mod, in your experience? Some folks suggest an NFB mod ain't all that much on a PR, or makes their amp too noisy. 2. Would you use a switch (say 3-way, Normal / Less (bigger R) / Off) versus pot? 3. Can you suggest pot (or resistor) size / values? 4. Experience or thoughts about Fenderguru's .01uF or other value cap in series with the NFB resistor?