found more pics
https://imgur.com/gallery/iha3y
BEEEP BEEEEP BEEEEP
CENTER CENTER WHEEL ALERT
WEEEE WOOO WEEE WOOO WEEE WOOOO
I have some special ideas for a center powered caster for a hovercraft board, 4 wheels on a rocker suspension, with battery and all built into the massive space available.
Not sure how I missed that 5th wheel before, guess from the videos pushing in a skatepark that it was not motor propelled.