Hi efferman,
I have just taken a look at all the parts, and I like the driven steering hub small. But with the normal female cw joint, I am sadly missing a half stud for connecting these wheels properly http://brickset.com/parts/4297210.
Or will these rims fix it? https://www.shapeways.com/model/1785769/six-hole-rime-for-49-5x20.html?modelId=1785769&materialId=6