Florian,

Thank you for explaining these things so well. I feel confident now
that I've done things properly so far and I know how to proceed, as
soon as I can.

>

> For the lin FM pot I used the 50kPot for the log FM (i simply

I'm going to install a dedicated pot for mine.

> As far as I know there are sine shapers with several diodes in
> antiparallel setup, but I do not know an online example for it.

I'll keep looking, but thanks. I was being too specific in my search
perhaps.

> A-120....

to keep the frequency of this "filter" you have to increase

> the capacitor.

Of course, that makes perfect sense.
I did the mod with a DPDT switch bringing the parallel R/C pair in
and out of circuit.....should be great, and allows preservation of
original design sound, but I haven't been able to play with it yet.

I really appreciate your help.

Nick Keller