John,
On 3 Aug., 06 in a thread about spin poles you said that you were working on an adjustable pair of tip stays. This caught my interest because in very few sailing days I noticed that my spin pole lost the pre bend which I attributed to 'not tight enough knots'. Although there is some truth in that, I also found in the West Advisor (West Marine) a statement about Spectra/Dyneema/UHMWPE line, ".........has the best strength to weight ratio, low stretch, and very high strength. Very slippery with good hand, it has poor knot holding ability, and a low melting point (300F).........." From this and another statement about "creep" I'm lead to believe that Spectra may not be the best material for establishing pre bend in a spin pole system that will snap as soon as the bridle goes out of adjustment. I am thinking that a small cable like the ones used for trapeze with small turnbuckle and shackle could be used reliable, and quickly.