QJ, I understand what you mean in terms of recommended sails: a pro can get advantages ad enjoy from a truly oerpowered condition while for an advanced can be a nightmare ... it's not only a matter of fin, weight but mostly technique.
I would use the 105 mostly with a 7,2 rs4, next year I might replace it with a 7,7 and a 6.x for stronger conditions.
...i also understand your feelings about Vasco, always better than other centers, like the one that use to be near maili's beach ...
ciao