
You guys ROCK! Thanks for the props!
Some Qs: would it A) make sense and B) be easy to do in ExpressPCB to add a ground plane?
BTW, in the powerpoint layout there are 2 (didn't see more at a first glance) gnd traces that are not terminated. Maybe they are for isolating the adjacent traces. Any ideas?
I do not fully understand every aspect of designing circuit layouts that could cause noise issues. It would be easy to add a ground plane, but I'm not convinced that it's really necessary. For starters, because of all the closely spaced traces, it wouldn't end up filling very much space, except maybe around the power supply circuitry. I could also be mistaken, but the two non-terminated ground traces don't appear to me to be be isolating anything of any consequence. Plus, Stephen's reports of how his perfboard build is very quiet tell me that there is a low risk of having interference issues with this circuit. But, I am certainly not an expert on the subject. If anyone can explain where and why a gound plane would be beneficial, I am all ears.
Would it be possible to add a second C24 cap (tail to tail to the existing one) like in the original vers 3.? This might make it a bit more flexible when tuning the LFO.
Well, there are already two C24 caps set up for parallel switching. But, I can add another pair of pads that would allow for the two caps to be either in parallel or in series.
I would be happy to beta test the PCB (don't know if it would be better to post this in the other thread?) 
That's cool, Markus. Thanks. I think everyone who gets in on this first order could probably be considered a "beta tester."

If one is omitting the gate, then jumping R34 and making R38 10k is the way to go (not having R35 or the jfet in there at all).
Thanks, Pelle! That's a really good note for folks who don't want the gate.
did you see the note in the power point layout regarding the wiring of jumper 13?
You mean, even though it's shown connecting C16 to the node at the output of IC1b, it's really supposed to connect C16 to the node at the output of IC1a?
... kinda curious.
Thanks, y'all!
~ Charlie