I tried to imitate the internal configuration of the Ciat-Lonbarde Cocoquantus pentagonal oscillators (Quantussy).  It uses four VCOs and four sample and holds, patched for cross-modulation.  A more faithful imitation would need four more sample and holds.  And that still would be only 4/5 of a Quantussy.  It’s followed by the dual CGS tube VCA and the dual MOTM-480 filter.  Digital echos were added by the MPX-1.  No Ciat-Lonbarde instruments were used.