The stereo jack is a very cool trick, Chip, thanks.
The KLM-366 and 367 aren't full of jumper wires like the effects board if I'm not mistaken, so not sure I can explore this for now but if I could have lots of CV insert points, that would be awesome.
I might try the idea of a new LFO or one LFO modulating another, but I am still waiting for parts.