Bruce,

Had enought sailing on your own ?

Yes, the 6" would make a difference, longer boats are faster !

And the extra ? Kg you would have to carry (as lead) after adding the jib would be a pain...

F18 is 180 Kg. I17 (euro) with kite is 161Kg. cannot believe that the Jib kit would come in at 19kg !!!!!!!!

Not a good plan me thinks....