Originally Posted by dizzy1

To float the top deck on the older HB car, you find some scrap 1.5m graphite and made to thin short bars that go from the front to the rear screw. One on each side. Counter sink the holes and use flat head screws. This held the bearings down. Then you raised the top deck with 2m spacers. Just needed it high enough that the top deck didn't touch the bars you made. This allowed the top deck to float without attaching at the spur location. Wish I had a pic but this is Hiro and many ran it back in the day.