I got Björn's done.
Here's the guts:
We can definitely consider the board design to be verified now... works great!
Now that I've compared it head-to-head against my HB, I'd say that it's more "rock n' roll" sounding than the HB. The HB has a fatter low-end, but the Folk Driver has a more aggressive in-your-face midrange. But the basic character of the two are very similar. You could probably make the FD sound even closer by possibly using larger input/output coupling caps to beef up the lows a bit, but I went with the values I chose because I really like how tight it sounds as it is.
It sounds really cool when you stack the two. I used the HB as a boost (all knobs full up) in front of it, and it got a great heavy rock overdrive... haven't tried it the other way around yet.