It would be interesting to know if there is any real advantage in a carbon bodyshell, other than the bragging rights.
It is a wonderful material for the right application and has almost magical properties, but is really only appropriate where there is a major strength, stiffness or weight
objective. Picking up a 14ft racing dinghy with one hand made a convert out of me.
Trailer bodyshells are primarily concerned with getting sufficient rigidity to support themselves and being durable - making them half as thick out of carbon achieves neither of those objectives.
"But it could save 100 pounds on the weight
of a bodyshell for less than $10.000 extra" isn't really a game changer, is it?
This looks like a case of 'specification-itis' where something is desirable not for whether it performs well, but for whether it impresses other small boys (of any age).