Hey, I think that might have been my Studio Pre! If so, then I didn't mod it in any way other than swapping out all of the preamp tubes. They were pretty old when I got it. I think the one that I traded you for the DC-5 (if I'm even talking to the right guy here...haha) had a mixed set of tubes in it. If it did, you might want to try moving some of them around to see what a different combination would sound like. I started with the Marco Sfogli settings to get a great lead tone, but the clean won't sound very good in that setup. I ended up with 2 Studio's so I could have one set to clean and one set for lead/rhythm. I couldn't find a good mix.
Marco's settings, from left to right:
9, 3, 7, 2, 7, 5.5, 10, 0 with a regular V in the eq., bright and fat on. He bumps the lead drive to 7.5-8 for leads. This setting is a bit noisy...
My settings, left to right again:
7, 6, 7, 2.5, 7, 4, 7, 0 with both bright and fat on. My GEQ is set pretty much like Petrucci's, so the middle slider is either on, or just above, the bottom line, the two bass sliders are a little above the two treble sliders to make a slightly bass heavy V shape. Again, this one is for a good rhythm tone, so the clean may suffer. It is more balanced than the Marco setting though.
The DC-5 sounds amazing now by the way. I switched out the tubes with a new set of JJ's (6L6's and preamp). It is like a little 2 channel Mark head now! It is pretty close to the new DT album currently... and that is good enough for me.