Figured I'd update this thread, Here is a full rundown on what I've done to my amp so far:
Remove R277 and install a jumper.
Remove R272 and install a jumper.
Remove R271 and install a jumper.
Remove R110 (680k) and replace with a 470k, remove R322 and C10 (both which are behind that red cap.
Clip and jump LDR 4, just cut the leads as close as you can to the body of the LDR and just solder the leads together on both sides.
This includes changing both gain pots to 1 meg and changing the cap at C55 from .10uf to .0047uf.
Doing this will boost your high gain tones significantly, but will however turn your clean channel into a
LOUD overdrive channel. It will also clear up that fizz that you are talking about.
I however rarely use cleans so this was right up my alley.
However, use caution while desoldering/soldering in these tight areas, these traces can lift if you use too much heat with your iron.
If you don't have an adjustable soldering station use a 15-25w iron, or keep your soldering station at 650-700F.