it did not but that idea is interesting, bad for high speeds fairly obviously.
there are some two wheel caster boards that ride somethinglike that but they are much smaller skate style not big AT board like the Speedboard
hope you find it cool! I would love to work on an electric one made out of the Freebord parts that I will be making electric.
basically just Freebord caster base on angled riser, plus motor slip ring stuff if electric. hmm or center e-caster… dammit whatamidoin