rob...
i only got one person to buy a short ram so i havent made the money back i put into this. basically im down about 85 dollors so far. which isnt too bad and hopefully i will get a few more orders later. no big deal.
second about heat...
i will be buying a mold myself of the stock imrc. weather or not the cf imrc has a vent is based on who wants one or not one on one basis. also composites.. ie fiberglass, graphite, kevlar... and so on are reflective heat insulators. that means they both retain and reflect heat. carbon fiber has about the same thermal retention as aluminum believe it or not. 1 pound of aluminum and 1 pound of graphite hold about the same heat in relation to each other. but 1 pound of graphite is way stronger than 1 pound of aluminum. so less graphite is needed to keep strength the same bringing thermal mass way below what aluminum would be. so heat soak would not be the same and heat would be reflected better with graphite.