DIAMOND CORE FINS
The diamond core rail system is still being developed as repeatedly drilling a hole with a tolerance of +/- 0.2mm proved to be difficult. I have developed another system that will be prototyped shortly but in the mean time I have been working on producing CAD files for 3D printed fins. The fins are made out of thermoplastic that can easily be recycled at the end of it's life. The fins are significantly lighter than conventional fins due to the lattice that makes up the internal structure. The fins have not been tested yet as not all files have been printed but testing is likely to occur within the next couple of weeks. Keep posted to find out how they go.
The fins below are straight off of the printer and are surf ready, addittional finishing could be carried out but it certainly is'nt essential.
I have recently tested the fins. They initially worked very well but one of them snapped off. I will probably try ABS next because it far stronger than PLA when produced through a 3D printer. The layered manufacturing method employed on a 3D printer clearly has its disadvantages and with current low cost machines the process is probably better used to produce a mould for the final fin.
I may also skip the ABS and go straight through to manaufacturing the fins out of BIO RESIN. This would mean a snapped fin would not be an environmental problem.

