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bdl2333 said...Aah that must be why my sailing has gone from average to complete rubbish over the last few months as i've gone from Neil Pryde to Naish & Sailworks with JP boards

that's exactly right... Naish Sails used to work with Mistral boards but then they changed something which results in you having to use Naish boards exclusively.
As for Sailworks, they only work with some obscure brand from the US no one has ever heard off.
BTW, another interesting brand is Goya sails... they seem to work with both Quattro and Goya boards.... so you are getting tow options for the price of one.