I have turned off the presence internal trim pot on mine and maxed the bass trimpot. This way I can now use the tone control on the pedal to adjust to different amps (I play on rented backlines mostly). I mostly set mine up as follows:
volume - 10 o'clock
tone - noon
gain - 2 o'clock
This way I get a nice low gain overdrive.
nice idea.
Man I'd like to play on one!