I want to make a flat sheet (or rather block) of carbon fiber that is 3cm thick? It's not a big block, roughly 7x7cm. I can only imagine infusion would be pretty useless for this as vacuum will have hard time pushing down that thick of a sheet so I'm thinking wet lay up and put something really really have on top to compress. What say you? Also, most importantly, how many layers do you think i'm gonna need to build that kind of thickness?