I couldn't be happier with this mod. It sounds just like in the youtube clip; a very bluesy, sort of broken overdrive tone that is extremely transparent. And the ouput volume increased A LOT. Just about no breakup at all when gain knob is fully rolled back. To be honest, I don't understand why this super easy mod hasn't got any attention compared to the other DS1-mods.
I did lift the C12 too (as suggested on a few places). That made the pedal very trebly sounding, something I didn't need, so I put it back. I could see that on some rigs it could be of use though.