OK just tell me I can't see but does each axle have one freewheel and one disk adapter?
What did you discover about the axel size, any drilling needed?
very nice , hard to tell is it adult or child sized ?
What's the rear pivot look like ?
What's the track and wheel base ?
Welcome to the Crew Wayne
Unfortunately we tend to build from the Ground up. So I am not sure if any of our advice would be good. As to
I'm with Frank- looks to be a lot of fun and simple to build. Congratulations on being so creative.
....wow - that looks fun indeed, and simple to build I'd imagine