I was coming here to create a thread on my FatPants issue, Saw Mike B's post.. started to list my issue in his thread because I have the same but moved it out here to a new one so to not hijack his thread.
i just finished my FatPants build and it seems that I dont even start to get a boost until both knobs are turned up quite a bit on the body setting and even more without the body switch...
here is what Im getting...
Q2 @ 8.9V - Q1 @ 17.8V
Body switch OFF - Unity is with Volume at max and Fat knob at 12 oclock.
Body switch ON - Unity = Volume @ Noon and Fat @ 0, or Both knobs at 11 oclock
If I ignore voltage and dial in the trimpot pedal for max boost Q2 is at 3.8V with Fat knob at max and body switch off... it goes to 16v when I turn the Fat knob all the way down.
I would suspect your values on some parts. I don't know specifically what parts, but it may also be that you have a solder joint as well. Those would be my suspicions.
Jacob