Went for a cruise in August in the Pacific Northwest on my F31R. We sailed the vast majority of the time, and as a result had some pretty short days. I kept wishing for some horsepower in very light air--- quasi drifting conditions, where and increase from 2 knots to 3 knots SOG is a big deal.
I have had a screecher and that is not what I have in mind. can't point for nothing. and usually built of heavier fabric than I am imagining.
How about this: a mast head furling sail tacked to the screecher tack point, which sheets to the cabin top. fabric would be something like DP CZ-05.
I would probably have a short foot and a hollow leech to clear the shrouds. And I guess I would have to add top mast shrouds. Maybe.
I wonder about sailplan balance- might have lee helm. Avertable with a big flat head on the main?