I have been experimenting with various materials to find an appropriate oscillating "mast" to support a striker in a wind driven musical sculpture. 6mm carbon fibre tube looked very promising except that it displayed a distinct bias in its patern of deflection. I assumed that this was a result of the process of it's manufacture and purchased some carbon fibre rod expecting this to behave in a uniform manner. Disappointingly the rods (especially in small section) display at least as much bias as if they are made up of ribon layers rather than strand. Any suggestions?