Thank you for the cool info.Just a quick addendum. Get hold of the Duncan Tonestack Calculator ( TSC ). It lets you do instant graphing of the frequency-response changes of different component values for a variety of tonestacks, including Marshall. If I stick 100k in series with the ground side of the Midrange pot, I get an overall boost of several DB and a boost of about 6db for the mids and upper bass.
Fun and useful to play with.
Of course you have schematics, all builders and modders do. Why don't you just say you prefer not to share it?I'm sorry I don't have any schematics of my mods.
But thank you for your interest.