#1
Found a site here about modding a jcm900. Seems like it'll improve everything I hate about the amp.
I was less treble and more bass and seems like this should work.

Here is the document
http://web.aoct.org/marshall/jcm900-gain-mod.txt

How much do you think this mod will cost?
Gear:

Gibson lpj
Epiphone Les Paul Standard
Epiphone Les Paul 1960's Tribute Plus
Schecter s-1
Marshall JCM900 100WATT HEAD
Fender mustang 1
Dunlop Crybaby
Danelectro Distortion
Tanglewood exotic electro acoustic
Westfield Bass