Edoardo Gennaro sent me info on his recently acquired Polaris [1];
most interesting is that it came with an external programming box
much like David Clarke's ChromaKnob for the original Chroma [2].

[1] http://www.rhodeschroma.com/?id=2123#302459 (click thumbnail for
larger pictures)
[2] http://www.rhodeschroma.com/?id=chromaknob


Chris