- The Zing II - This version incorporates a few lessons learned from the first Zing along with some new features. I also abandoned a few ideas I had after building the original… Made from painted RAM board this portable track has an approximate footprint of 17′ x 8′ and despite the small size and simple layout it packs a lot of racing fun in the space. With a half turn of each of the border wall barrier screws the borders themselves can be remove...