I just thought the idea of using a tube and welding on a yoke seems easier to make at home vs. casting them. A tube and axel seems pretty generica and easy to make but the tricky part is how to mount it on a baseplate....
I skated the G&S truck and could slappy anything.....I cheated by riding tight trucks and tipped and dragged onto the curbs and eventually busted the kingpin.
Man...those Canadian z rollers should be called zed rollers.....