Hello,
some comments regarding things I read.
There might be a disadvantage by loosening the downhaul.By that you might create a "baggy" shape of the mainsail.Thus alowing more weight pushing the mast down.
I sail a nacra5.5 mostly singlehanded, when I capsize I detach the main-sheet, so the sail sinks inline with the wanted righting motion.Then I put the daggerboard halfway in,making it stronger to stand on.After that I fasten myself to the righting line,pull out a (in the meantime become cold) beer and wait.Usually there is not enough time to finish my beer.
Reading all the articles there must be a solid solution to the righting problem when all combined.
Good luck and can someone please make the winter disappear?
P.