Let me clarify, he said one layer of a heavier CF would work, but I am thinking two or three layers of aerosleeves 2.5" CF might be best (it is around 11oz though, so 2 is probably more weight then yours was). And I think I may be able to get the epoxy through two layers without to much trouble. How did you get a boattail on a minimum diameter rocket? That looks really nice! I think I might do the fins with a layer of CF, then attach them and do a 1/2 tip to tip and a full tip to tip with 5.7oz CF... I also plan on using the chopped CF in the fillets. Should be pretty strong... I am also now looking into using mylar on the outside (for a smooth surface) and wrapping that in shrink tape. If the tape is heated from the middle to the ends then the epoxy will flow out the ends of the mylar outer layer, and then when cured they will fully constrict leaving a glass smooth surface, with a small (.014") "line" where the mylar overlapped it self on the actual composite layer. Do you think it would be a lot stronger to go with 3 layers tip to tip on bare .063" G10, instead of CFing the fin's, then doing 2 tip-tip layers... I just think it would make the entire assembly a bit easier to do without a large amount of strength taken away...
I read on a site about a tip-tip technique where you apply the fabric and epoxy, then put a peel ply layer, and a breather. These two layers are taped down (just to hold them in place) and a bag filled with small weights (lead weights work well) is placed and rested so it is touching the entire tip-tip assembly. This keeps the fabric pushing tightly on the fin, and also removes excess epoxy. Does it sound reliable? Did you just push it down by hand?