Look close at what your attachments and fittings weigh. Dyneema will stretch when left tensioned. On sailboats it is slacked when not sailing, and tensioned when it is time to sail. Whether you leave it tensioned or slack it when parked, you will need hardware that allows you to make these adjustments.was thinking of saving a little weight on the drag-anti drag wires (double drag wire system). Talking to Piet builder today ..... the compression ribs on it are top and bottom 1x1 wood......because of the geometry of my design which is the same as the one that failed .....any D-nose style torque prevention is lots of skin and weight .... Were the wing location and geometry different from the start it might make sense but this is the last piece of the puzzle and I am locked into certain geometry........ though is to have total internally design/braced for all loads and fabric cover. I currently have a preliminary designed cantilever spar of 15 lb.....5.33+ G limit.... one issue is there is only so many thickness of material .....another argument for composites as one can tailor the thickness.
Are you trying to get torsional stiffness with Dyneema cables inside the wing? I want to see how that is done.