I've suggested the Moog Opus 3. Well, I'm not the only one who thinks it's the cat's knees, or is that the bee's pajamas
https://www.youtube.com/results?search_query=automatic+gainsay+opus+3I've commented heavily on the videos. He hasn't got half of what this thing can do
I have PDF's of both the owner's and service manual. The latter would be useful to model it's synthesis method. To whom do I send them? Let me say, the user guide only scratches the surface about what it can do, but it does point you in several directions. The "chorus" is not really a chorus but some kind of phaser so that when you use it on "slow" it does not sound like a real chorus. Also the Opus 3 keyboard is a 16' rather than the usual 8' so a 61note KB oran Octave up switch would be a good idea, or a switch that gives you a +1 octave that can be run by itself or mixed wiht the noraml Opus 3 octave. What about adding the 5-1/3', 2-2/3' and 1-1/3 registers and a mono mode might do some good
Knowing what I do about Arturia, I expect to see some cute mods. like full 16', 8' and 4" availability of the sawtooth which would enable the "strings" to be used as organ "string" stops (highpass filter mode, CF about 40% down from the top and EMPH at about 60%,) at 3 footages and likewise the "brass" as organ brass or horn stops at 3 fottages, and a fully polyphonic mode like with the Solina V. Maybe set the Organ "tone" filter as a multimode resonant filter
I think the Kontakt version is a sample playback instrument