Hi Chris, All parts are made by me in my own workshop, the springs are for a Jaguar 4.2l straight 6, never fitted so nice and clean. Most valve springs are the same size, some have doubles, some single, I needed 12 springs so a set for a 6 cyl was perfect. The main problem was the maximum travel from no load to solid compression is 30mm so assuming 1/3 compression is needed to simply hold up the tank I had to get 20mm of spring movement to translate to 2" of wheel travel vertically! If you have a lighter tank than mine (not hard) then you could use the large spring only (soft), the small spring only (medium) or both (hard) depending on what type of ground you were going to be trundling over. The first bogie is now welded up and complete, and looks good bolted to my hull, i'll give it a coat of paint and post a new pic in a couple of days, meantime the production line is running to complete the next 5. Should be a bit faster with the sheet steel parts as I fixed up my guilotene this evening (300mm long an max 6mm thickness) so chopping up the 3mm/4mm steel plates will be quicker and more accurate, thats the plan! Phil
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