Hi - I just checked (still had my old Trinity on my desk :D) The sides of the old mouse have a different shape to the V2, so they don't fit.

The panels of the old version are a bit longer and also the shape of the box (where the buttons are) is different, so even with Dremel and co it might be difficult.

Personally, I usually use the 12 panel (for MMOs) and find that the new one has a much better feel than the old one. The keys are more differentiated to feel, there is a 6 and a 2 panel included.

Just try it out, maybe you'll be happy with the new one after all ;-)

LG,
D