Gday

If your looking at a new main or new sails, the safest bet would to get some from a sailmaker that has put a bit development into the mosquito sails, if this bloke has - then go for it. You would be better off sticking to what the big guns are using, for example Goodall would be the most obvious, Irwin, even give Ashby a crack at it (ex-Goodall) These guys have developed their sails over the years, right amount of depth, luff curve etc... to suit the weights of the sailors.

I know they're all Victorian, but its nothing a bit of extra freight won't fix.

Regards