@BraceMaker you're right about the issues with prepregs and cores. I've always thought "Prepreg" was something of a misnomer because the carbon is not really "impregnated" within the epoxy, it is just sprayed onto the surface of the epoxy, and it doesn't soak into the fibers at all before being cured. Prepregs were developed originally to be cured in an autoclave, with high pressures being used to ensure the the epoxy then gets pushed into the fibers and that any air is either removed via vacuum or it's crushed down to nearly nothing by the high pressure of the autoclave. When you use the same material in a part with a core you run into a couple problems. Like you said the core cannot handle that kind of pressure without getting crushed. Also for a long time prepregs were made specifically and only for autoclave curing, so you couldn't get it with higher resin content. Quite a bit of resin is needed to ensure any ski gets a strong bond with the core, because the core is somewhat porous and non-uniform on the surface. So if you cure prepreg on a core, you never get a really good bond. I think today you can get higher resin content prepregs and even bonding prepreg layers (I have no idea if Goode uses these), but those would help with bonding to a core as well as improving surface finish. When I was building the AM33 with prepreg I had to be super careful about what materials were used to cure the laminates to avoid starving the fibers of resin and ending up with a porous or pitted surface. We were using a vacuum bag in a cure oven, so didn't have the added pressure of an autoclave to help with fiber consolidation and air removal. I've now been deeply involved with RTM, Prepreg, Compression Molding, and I've even built a few Vacuum Infusion skis. I can say that hands down a properly built* Compression Molded ski has the best balance of strength, performance, and consistency. *Not all compression molded skis on the market are properly built IMO B)