Ditch the Kevlar. It's a bugger to work with...unless it's free...
It also is not really doing much. I will devote a chapter in my mythical book on why Kevlar is not what it is "cracked" up to be....
Kevlar has 2ce the young's modulus, but the real advantage from the second layer is the laminte thickness (d^3 for stiffness, d^2 for strength), plus having two layers to set up a "push pull" really delivers more than this as the layers are spaced out more than just the single fibre thickness. Tim U. can give you true chapter and verse on this if asked nicely. After having a Kevlar hull to work on I am convinced it is not what we should be using at home.
More usefully:
EJ used 1 layer 200g carbon weave everywhere, 1 layer extra 200g glass on bottom and knees to nipples on deck (but again have only sailed her 2ce). Strawberry's E5 was the same reciepe, but glass all over (although this still embroylic). All up we bought under 30m x 1.2m.
We used 80kg foam all over (as I bought the wrong stuff). My guess is that the worse loading on these boats happens on shore and from the crew/helm colliding when the boat stops and they don't, so I lived with the heavier foam.
I really would tap Wiz (Matrix, details on the Wiki + other suppliers) - the extra £'s for the carbon pails into nothing after all the time you are putting in and the resin/consumables - not to mention the paint and fittings (if you have not already costed the resin, remember for all that cloth you will need more juice). On the other hand I think it would be viable in glass, but you have given up one of your "get out of jail free" cards from having everything ludicrously overstrength.
