I've had my PT100 for awhile now. On the dirty channel, bass around 1:00, mid 11:30 treble 2:00, presence 12:00 and feeback 11:00. No whomp. I like my heaviness, so boost gain 2:30. Awesome.
I am historically not a "booster" and have never, ever found one I like. I just bought a Koko boost, and damn this thing is great. I can't decide yet which I like better, the clean boost or the mid boost, but either way it doesn't squash my tone like nearly every other boost I've ever tried. Kick that sucker on for solo type things and its almost like kicking in one of those sustainer gadgets (meaning, for reference I have a Jackson PC1 with the sustainer) where even at low volume you get nearly endless sustain that easily blooms into feedback.
I can't get enough of this damn PT100. Live and loud the clean is CLEAN when you want it. With the Channel 2 and boost (I guess its Channel 3) you have a great palette of tones, and THEN the Koko just takes it up a level for perfect single note stuff. I loved the amp before I got the Koko, and it doesn't NEED it, but its a perfect addition.
Hate to say it, but I haven't turned on my XTC or Herbert for weeks now.