This is, I believe, basically a Mu-Tron III with lots of extras added. Probably a really cool build, but good luck with the wiring 😉 It probably pays to also keep the schematic close at hand (I based this one on a schematic found in the relevant thread over at FSB).
Update (18.12.2012): Layout has been verified as working, thanks to Roland for this!
I’ve built this a couple of times but haven’t managed to get one fully working. All the controls do what they are supposed to, but I don’t have any sweep – the range and mode change the sound, and the LEDs light up, but my filter is a fixed pitch. Any clue as to where to look for the problem?