Drastically, Have the marvel mod and pretty much have determined pre2004 mode is best. But I hate an amp where you can have excursion tight, presence noon, treble noon, mids noon, and bass almost off and still have the amp feel like there is 20 wool blankets covering the amp. First I dont think there is a enough negative feedback in power section. Presence control is too broad and can sound to strident and ice picky when at 2:30 or above(which is needed to get blanket sound off) Excursion is not focused enough and too muffled and knocky sounding and you almost have to crank presence to compensate for added mud.( unlike the womp II on pt100, can be on full with presence off and sound useable) but any way I dont use these resonance, excursion, womps switches anyway, Never felt they were needed. I almost want to completely over all the bogner or sell it. I want the amp less modern sounding but still want some 80 style gain levels. Want more of a power section of JTM45 ( more negative feedback) I guess I could just move the feedback loop to 16 ohm tap. I want the presence control to be more focused and not as smeared sounding as it is now( Lower cap on presence control I guess) Excursion crap could be removed and switches could be used to revoice the initial input to have stronger mid focus to stronger mid and treble focus. Treble knob seems to hifi in its sweep like its only affecting 8k and above. I guess I would love to have the Bogner red channel be voiced like the Soldano SLO 100 lead channel. The Blue channel voiced to be more plexi(which kinda already is but need it a tad present and clear) The power section could be revamped entirely to be more like what Suhr does with his PT100 but since I dont like resonance so the excursion switches can be repurposed(I know i said this before) Over all I like high gain vintage style versus high gain modern style amps See if I sell the amp and matching 4x12 I could at most get 3 grand total But I betch I can mod this sucker for $500 bucks to have it be exactly what I want. What say you, thoughts? Thinks of calling some amp builders and ask what they can do for me mod wise.