I finished a "better" Tristar 64 RGB Mod last week. These new Mod do no longer need an additional switch. The RGB Quality from SNES Games is a little better insted from an original SNES.
(http://i16.photobucket.com/albums/b14/moosmann/electronic/tristar64new2.jpg)
(http://i16.photobucket.com/albums/b14/moosmann/electronic/tristar64new1.jpg)
(http://i16.photobucket.com/albums/b14/moosmann/electronic/tristar64new3.jpg)
I don`t make the instruction diagram public at the moment, but I do this in the winter holiday weeks 2012/2013.
Greetings Markus