After almost 6 months of obsessing over this design, I think it's mostly ready for construction. There are a few phantom parts that had to be worked out. For example, I realized that I could extend plates from the differential supports to also support the steering plate and attach idler and tensioner sprockets for the front drive chain.
I also need a way to tension the "road" belt. I came up with a tension block that would mount to existing points on the drive train frame. There is still some cleanup to be done before I can address those two requirements. And I still need to find a place to mount a tensioner for the rear drive chain.
But I've started creating to-do lists to capture all the tasks needed to build the base. This weekend, I want to begin making machine drawings for parts. Then, I will be reaching out to folks who expressed interest in fabrication and assembly.
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