There are other manufacturers who use "cross-feed" circuitry in their products, they don't call it "Lucid Mode," and it may well be differently produced. In the Decware line it is only available on the Taboo, and it may be because output transformers are needed (just a guess). CSP3 models don't have these.
I found a bit more information about Lucid Mode(s) here:
https://www.decware.com/newsite/Taboo3owners.pdfI was wrong in that phase plays a part, at least in "New Lucid Mode" which is "Extraction" in the Taboo Mk IV.
Steve is really the best responder for this topic. You may try emailing or calling him about it as he doesn't seem to have seen this thread.