the metal tube for the platform is 50mm high, by 4mm thick and about 90mm diameter, then just grind a circle for the top out of some 4mm plate, the threaded tube is from rally design's its about 100mm long and if you use a 9 inch spring, then you can get the stock hight of around 12 inch and you can adjust it down by about 2 1/2 inch.
