I *very* strongly advise against changing the lowers system. You're virtually guranteeing yourself a rash of gear failure if you change things in that area. As far as pins are concerned, you will not get the tension you need with anything other than a lashing, and the boat is engineered for the loads coming down the strut. I think I have an ex Canoe strut sitting in a garage not that far from Soton, and am planning a trip to Marineware when the snow clears, I could maybe drop it off somewhere. You could combine the two...