Hi Gary,
Sad to see you leave the Mozzie fleet, I`m sure they will miss you.
Good luck with what sounds like a very exciting project. One question : If you`re shortening an A-class, I`d assume you`d be reducing it`s weight. I`d then assume the boat, all-up incl spinnaker kit, would weigh no more than 80-85kg at most. How are you going to find an extra 20kg to make F16 min. weight ?
Maybe get concrete daggerboards ?

Cheers
Steve