David,
We don't have a min crew weight because it is just not as important with the hull shapes we are using. The more conventional V shaped hulls take a significant increase in wetted surface when you add weight but with the bouyancy so low in the F16 hulls the increase in wetted surface with increase in crew weight is significantly reduced.
Add this to getting your sails cut for your crew weight and the use of the spinnaker off the breese which is a big loss traditionally for heavy crews. When you also consider that you have to be able to right your boat, a min crew weight is not needed.


Regards,
Phill