Use 'PURE' soya margerine and Doves Farm gluten free flour. Keep the marg really cold and rest the pastry for an hour or so after making, clingfilmed in the fridge. Brace yourself for it crumbling all over the place, cobble them together by patching and sticking the crumbled bits on with water - unlikely to be pretty but the will be edible in a crunchy sort of way. DH has his like this too - arghhh!