someone i know took a bendy plastic and duck taped it to ad strength and weight, then take a smallish pair of crocks that you can take the heel piece thing and tape it to the middle of the ski, it works well
some extra little things, dont make the skiis to long his go up to about my nipps are are about good and the size of the shoe dosent matter, just so it will hold your foot in dose. you should prob use a cheaper crock too, the actual ones are expensive