I wired the champ primaries and mains so it would hit the fuse first, then the switch. Now, the volume switch acts like a master on/off (which i prefer tbh), and there's some nasty hum from quiet-ish to full loudness. I even connected the main hot to the tip of the fuse holder like Morgan recommended in another thread. In my picture the pen points to the new red wire that connects the black and brown primaries to the switch. The switch turns on with a lot of crunchy static.
I've also included a very, very accurate and to scale layout of what I did. Also, it's worth noting that before i changed it, when plugged in and in standby (switch off) there was an almost buzzing sound coming from the speaker. Either input, or nothing plugged in at all, and nothing changed if i touched the transformer. However as soon as the switch turned on, the noise went completely away, and the amp was dead quiet all the way to 12. What have i done wrong? Thanks in advance for any help!