John, I`m assuming you are thinking of a spreader setup on the mast, meaning that diamond wires need to be retensioned each time you break the mast down for transport. I see that elsewhere a spreaderless carbon mast has been discussed, with built-in prebend. I think if you combined the two you`d have a mast that can be taken apart and put together more easily, like the windsurfer masts. Unless you design the diamond wire system to be retensioned to your last good setting easily, and one which allows quick fitment and removal of the diamonds and maybe even the spreaders.
Of course all this talk is meaningless for me, unless you can retail it for around 200 pounds !
But yes, I think it would be a marketable idea, if only the cost of carbon would be more reasonable. When two-piece windsurfer masts came out they were looked on rather sceptically, now you will struggle to find a one-piece mast.