I'm keeping it simple.
The fancier it is the more that can go wrong.
I went with the wider piece of plywood so I can run dual
motors if it handles as well as I expect it to.
This is the prototype, I'm gonna L brace a couple pieces of tubafor with a hole in it to run the rear axle through.
I'm thinking threaded rod with double nuts (safety first) to hold the sprockets in place.
Put some plastic over the rod to keep it from wallowing the holes out.
I know what you're thinking....where are the brakes.
Probably run a scrub brake of some sort, probably be easier to do on the fronts.
Don't want to over complicate things.