Something I don't see on the market that I'd be happy to pick up would
be a CV controllable Solina style "ensemble" module.
I'd also like an add-on companion for the existing BBD modules
consisting of a compander and a steep lower cost LP filter to give the
option of an improved sound. I guess one could make a fairly costly
ensemble effect with existing modules if the S/N was a bit better.
Waveshapers.
I'll buy the wave multiplier 2 that comes out and would buy other
modules that reshape waves.
Exponential to linear, linear to exponential converters.
-nick