Thanks. And yes, Cees was taken quite early.
Just before he released his Purple Chorus, I had worked up a dual/stereo chorus of my own. Using two heavily modified Small Clone clone PCBs from GuitarPCB, I managed to create the 'Stereophonic Gizmotronic Symphonic Harmonic Perambulator Dual Chorus'. While Cees' Purple Chorus uses a single MN3207 BBD chip, mine uses two of either the MN3007 or MN3207 BBD chips one on each of the two PCBs.
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If you want to build up one of these, I can provide more details and put you in touch with Spencer at AmplifyFun to get a finished, printed enclosure if you like.