So I applied my dodgy CAD skills to the wheels situation.
- Tyre tread more like Curiosity's, as appears on Mars.
- Wheel centre a classic six-spoker - kinda like Curiosity's if you squint (a lot).
- It's a two-part design so I can maybe have another crack at the centre later and swap them out.
- BTW, the silver is paint, not a raw filament colour.
I figure these flasherer wheels are Jordan 1's - the nice alloys you fit for a show-n-shine. The original Sawppy wheels will be the work boots - the steelies you bolt on for circle work / skids.