Hello- I'm new and not sure if I'm in the right place but...

I recently obtained a 1996 Trace Elliot Tramp 112 40W combo, no footswitch.  Channel 2 only  in this config. I bought a generic "apex" brand 3 button latching footswitch which when connected should operate chan 1/2, boost on/off, and reverb on/off. It did not work.  Channel 1 comes on but won't switch to channel 2 even though chan2 light comes on-while chan1 light stays on?  Boost light comes on but has no effect and reverb is now foot switchable!  So that's 1 out of 3. Second thing was(I fixed it)a hiss and crackle/popping  on chan 1- I replaced the electrolytic caps and that is fixed.  Third issue- this is strange- when at mid to high volume and strumming a chord- a louder attack which immediately drops the volume which comes back a bit as the chord rings, the gain will sometimes drop out as well at the same time and switching from bridge to neck pickup will affect this gain drop/back in. This last one is the weirdest amp behavior I've experienced ever and have several 70's and 80's SS amps that have never done anything like this.

My Questions:

1) What the Hell?

2)does anyone have schematic and shop manual for this amp(I have emailed Trace Elliot, so far no response)? ***I checked the available schematic resources on SSguitar and no dice. Half of the links were dead as well.

3)Is there a schematic for the 3 button footswitch?  I can make my own but not sure what is required.

4) Should I chopstick the components to look for a bad solder joint? 

5)  Should I just burn it?

Any help on this weirdo would be appreciated- when I took out the board from the faceplate I was surprised at how simple the components were- nothing chip based, all analog and presumably easy to fix. I am very comfortable desoldering and swapping parts out.  Assuming someone hadn't been in there before and scabbed in non-spec parts? Schematic would help and I've scoured the google with no luck for this.

Let me know anything that might help.

Thanks.