I discussed this with a guy whose name we all know from the A-cat class and who has for many years made carbon masts and other carbon components. This was at the time that my homebuild was under construction and I had to decide whether to go for alu or carbon beams.

He assured me, based on his A-cat experience, that I should not expect to save much more then 1.0-1.5 kg per beam. At the time the cost simply did not weight up against the benefits.

Wouter