kevin,
i have heard that the guys building open 60 monos are building the molds from carbon. i am not quite sure why they do this. pretty sure it could be done with a good epoxy and lots of 10 oz.
there was an interesting story in pro boatbuilder a few years ago by henry eliot. he was building an a class mold and found it porous. i think he drew vacuum on the tool side as he applied more epoxy to the back side of the tool. this seamed to work. oh ya, he bagged the tool laminates on the the plug.
i would like to pick your brain a bit more, later. in the next few weeks i am going to be starting work on the new open 60, spirit of canada.
thanx.
keith