indeed! sorry, I'd been looking for a better entry into Gisin that might suit my limited (I have MTW, but have not yet worked through it, and my QM knowledge is also at an SR-level — when reading RPF's pop QED lectures I could see integrating e^ix terms instead of his little arrows, but that's about it) background, so I hadn't yet peeked into 16xx vintage Gisin.

SAHD reminds me of http://blog.sigfpe.com/2005/05/dual-photography-part-i.html (in part-ii the experiment was indeed successful, but that seems to have been lost to the mists of the web, at least while wayback is down?)