Haven't been around in a bit but here's a condensed version of everything:
I went headfirst into this and removed most of these parts instead of jumping them which has the same effect.
install a jumper over R277
install a jumper over R272, change the cap at C55 from .10uf to .0047uf. (the...
Been a while since I've been around but glad you found what you were looking for in the mod!
Personally I'd leave that resistor/cap (2.2M/82pf) in place as clipping them will cause the amp to not pass signal in some modes.
You could put a 5M5 resistor in parallel with the 680k resistor. This...
I didn't send my 2 ch triple to Mesa as I reverted it to Rev C specs myself, but I also can say there was a noticeable difference in the amp afterwards, tighter, brighter, more aggressive and growl-y mids.
That's one of the biggest and best amp comparisons I've ever seen! :shock:
Major kudos to you for that and digging your YT channel as well, got one of the best recto demos as well!