Maths is a good choice if you are interested in learning modular synthesis - see the 'maths illustrated supplement' - as opposed to synthesis with modules, if you see what I mean! delta v is also a good choice, but doesn't have the learning resources...
I'd go for veils over the dual vca - you can never have too many vcas!!!
Rings is not particularly similar to plaits - plaits has a couple of Rings-ish settings, but has a lot more besides (and vice versa)
otherwise @ronin1973 and @plragde have you covered
for mults - if you have 2 sound sources and 2 v/oct sequencing channels - then buffering is superfluous - as it is only really needed for pitch, otherwise passive is fine & in a tiny case such as this, stackcables or headphone splitters are a better option as they won't take space
-- JimHowell1970
I see! :) If I can fit maths I will. Does seem to be a great learning tool. Been trying to figure out what I would be missing by going with the Delta-V. Mixer, attenuverters?
Veils 2020 seems like the way to go for VCAs.
Switch to a passive mult as well, cheaper is better!
Thanks for the input!