I have seen that there were options for the B-series tractors to have dual wheels for the snow blower and maybe other accessories. Are there such options for the 716H? If so, does anyone have the details for the kit? I would like to fabricate such a kit for my tractor. Did they use hub extenders to bolt on another pair of wheels with tiers or were they a different type system? I can't seem to find any detailed information. Pictures and dimensions would be great.