Hi Eddie! I read your post, and heard the modded Marshall/Bogner. I have a 2204 that i'm looking to mod, but don't have pertinent component info. I've updated a few resistors, and caps' not getting it to the sustain i'm looking for.I have all the prints, as well as the added changes marked on extra copies. Wondering if you could guide me in specific component values preamp, and post phase inverter circuit modding.