hey Martin,
thank you for your kind words...
You have to know that the GUI part really took me more time than the internal circuit design on this one.
regarding the "tweaking-till-the-doctor-comes" factor:
I do that as well inside the circuit level.
But then I try to aggregate/destilate a higher level, so you can reach all good sounding knob-setups, without being able to dial in "useless parameter combinations"
for sure in some cases this is almost impossible and yes it could possible lead to limitations also.
Its especially very difficult with reverb circuits... where you have to bring all internal atoms to play together in some sort of network.
the tempo-sync thing maybe useful in the future for new stuff... I already though about some midi sequencing/arpregiator stuff.