Hmm, nice work. That's usually the sort of odd area that I tend to investigate, but for some reason I never got around to it.
You won't find that too many 'classic' demos from the olden days work, due to extreme hardware bashing, strange disk loaders etc. I know, because I tried just about every disk I had back when I first got the Falcy back in 1993.
A lot of the demos on your list were already made compatible with more than just the base STFM, Fantasia was a bit of a revelation though, so must try that. And I seem to remember something about Suretrip II running on Falcon too. I assume this was not off HDD. Still, good work
I await any updates with interest.