Yes, I believe that's true.Great job!
- 8 oz/yd² is ~270g/m² for us european, right?
Good question. There's a bunch of ways of doing that, and the one way I'm pretty sure I wouldn't do is with wet tapes on the outside....how do you join the molded pieces ? That's something that still is a bit of mystery to me, how just tape around a butt join is enough structurally ?
What I'd prefer to do is mold a joggle into one edge of each skin using tooling wax or perhaps just several layers of tape. Then you'd bond the parts together at the joggle using a bonding paste made of epoxy plus flox and cabocil. That's how we join our sailplane wing skins and fuselage halves and similar assemblies.
Another possibility is to mold a carbon fiber channel about 2" wide with 1" tall flanges, and use the 2" face to bond the skins together on the inside surface. The channel would serve as both a bonding element and as a stiffening longeron. It would add a bit of parts count and weight, but you could compensate by eliminating the longitudinal stiffeners from the skins. Doing it that way simplifies the layup of the skin, since you don't need to include the joggle and longitudinal stiffeners during the layup.