Thank's for the input Ross, I like carbon I don't think it will cost much more initially but will save money over time because I can homebuild the components and repair the breakages easily. Carbon on and in the hulls will add that extra bit of strength for boats that will be lent out at club level to kids. It's great to see people designing new cats and showing their designs enabling me to build a cat that suits my area's sailing, my kids want jib and trap for crew and extra fun so why not give it.
I pick up my kit tomorrow so now I just have to find the time to build it before the Sauna Sail.
regards