If it were built for me, I'd leave the clean on all the time and want one footswitch for 250 and one for DS1, independent, but hey that's just one opinion in a sea of many I'm sure. (for instance, I hate when you have to pick one sound vs the other with one switch, and then use the 2nd switch for the on/off of the selected sound - dedicated stomps for each sound is way better)It would be fairly trivial to allow for on/off settings as desired. Beyond a global bypass you could have 2 stomps for each distortion circuit but leave the clean signal on at times. The only issue comes in is the enclosure size, if you need 3 stomps total then it would be bumped up to a 1590XX box. Else if you kept it in a 1590BB it could have global distortion on/off together.