Hi Gary,
Not worried by the lack of weight, I've always had this problem. Used to race TheMightyHobie18(always on min crew weight) at Toukley and always done well. In Dubai, and around the world, sailing H16's on min weight & Topcat k1's at a very light weight, we've always done well in 20kn+. I suspect it is more us sailing consistently across a larger wind range and others starting to struggle in 20kn+. I've read some posts here talking ideal weights for 1up and 2up and to be honest disagree. If it's ok to sail 1up with a weight around 100kg, why would it not be ok to be around the same weight 2up. Just think....4 hands rather than 2 and more weight distribution options. On the extreme days (very rare in dubai) we also have the option to leave the jib at home (I don't think there is a rule opposing this). Also, GlennA cut the sails for our weight, and the average wind in Dubai (10kn). I think we'll be competitive in most conditions. We'll be on the water next week, less talk & more sailing!
Regards
David