if you are worried about weight, you can go through and downsize all of your fittings ropes etc. piss the hobie rudders off, i had a set of them on my old glass mossie 1342 which weighed in at 85 kg at the christies beach nationals. i think they laid the old girl up with a chopper gun.
however if you have to buy all new fittings it will probably work out cheaper to buy a set of hulls on weight or just buy a full set up and sell the one youve got to another beginner. as i am finding out ( i expect simon is also) at 95 kg anything under 10 knots sux @rse. stay in the club drink beer and wait for the breeze