Steve, those look great! I wish I had a green house sometimes, it's on the works on my "I'll hopefully do this in the future" list of things I never do. :-)
Every year the overwhelming majority of my Black Madeiras stay green and don't ripen, it is the saddest. :-( I haven't had a good one at all this year because both times it was going to happen we had a little rain and they just burst right open. I have that problem with Figo Preto a little, too. I've heard people suggest BM and FP are the same variety, but I think they are not. BM splits much wider, all of my BMs are dripping fig honey right now and none of my FPs are, and they don't look exactly the same either.
Richie, I don't keep them in plastic. Do you? Should I?