I am building a 15" skiff... stitch and glue style. 3/4 merainti
bottom, 9mm okoume sides. I want to do a rounded or fantail transom. I
have scarfed the sides where I am going to attach the transom, and
will scarf the pieces to be bent prior to bending. The bent pieces
will be part of a conic section with a 4" bottom radius and a 12" to
radius. If I remember correctly the my template for the pieces to be
bent is 22" tall and 26" wide at the widest point. The exterior of the
sides are alread coated with 6 oz triaxle glass and the interior with
3 coats of epoxy. I will glues the scarf joint and then glass the
exterior and epoxy the interior of the fantail.

Thanks,
Kevin

Nope, I don't think the 5mm would go either. The three layers of three
MM might go. As far as the other types of wood you mentioned, why
don't you tell us what you are building and what it will be used for,
we might be able to provide more info.
Scotty