Originally Posted by pinkfreud
The only thing I still find puzzling is the boost switch which doesn't make any difference in that direction. So you still need to use another pedal as a booster.
I just has to do with where the BOOST section is placed inside the FD2. It comes before the main OD section, so it pushes into the OD, creating more volume and more dirt.
If it were after the OD section it would add volume, but not any more dirt--which really could be great for pushing your amp into its own OD, but the FD2 doesn't work that way.
The catch is, you really can't push the OD any further than it already goes at 12:00 on the DRIVE dial. If you have dimed the DRIVE, the BOOST is effectively negated because it simply has nowhere to go
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Per the current TDPRI protocol, I have nothing more to say
until my cooling-off period has expired.