I have a 1980 100w JMP here. Looking for a close schematic..Ive got a few but nothing dead on. Its a 2203--JMP Mk2 Master Volume --unclear on inputs--looks like 4 factory holes. Unclear on speaker jacks--looks like 4 factory holes . It absolutely has can cap holes for SIX caps. Im asking because this thing has been cut / modded/ butchered. Im going to return it to stock 1980 wiring..but , im going with 3 , 50/50 filters , and id like to stay with hi/lo ins and 2 speaker outs. EL34's What can you share as far as a 1978-1980 100watt 2203 schematic , EL34 , NON jcm800 ? . Theres a lot of variations on these !!!