I tossed my metal Leopard tracks and went with the Mato ones. As long as you CA the rubber pad into place they are fine Only thing I lost so far has been a metal traction insert that was not CA'd into place.

So if you are keeping score on complaints, chalk me for one against the Heng Long metal tracks. They are really heavy and not prototypically correct.

You mentioned in the video about your radio system. Can you tell us more about this. Hopefully it isn't a system with an onboard receiver, and I hope uses standard radio architecture.