So I mention the "weight" word and all h3ll breaks loose? Some of you guys need to chill out some.

This is from the OP:
"I know all the F16 guys will say "make it 70 kilos lighter, and being able to sail one or two up". That's not the point here, I wanna hear propositions that can be applied to all cat designs and sizes..."

So where does my general comment not apply to all cat designs and sizes? I didn't launch an attack on the F18 specifically, and I don't even own an F16 (keep the overreactions up and just might get one though!) If the OP didn't want weight comments, he could have announced that clearly, but that would seem to indicate major prejudice, wouldn't it.
I can understand people not wanting their class destroyed by progress, but in the long run, the buck has to stop somewhere to let any real progress take place. Now hold your horses, I'm not saying we should dump F18! its hugely popular in the Netherlands and lots of my buddies are having a great time sailing their fine boats. I don't have a problem with that.
My comment about keels is that what is happening here, ie: the thinking, is very much like the way mono hull sailors reacted to cats in the beginning! What I'm saying is you can't talk about progress without considering weight, it's just not logical! Everyone needs to be honest about this AFAIC. Don't worry, I won't mention the W-word again in this discussion, it would obviously be pointless.