RE: Wheels
The fairings are made of balsa soaked in thin CA to make them a bit more resistent to crushing, then primed. The little straps are made from FliteMetal aluminum tape. Finally, the whole assembly is painted "Lichtblau."
IMHO the three keys to a realistic looking EIII are 1) a good dummy engine 2) good undercarriage and 3) a suitably busy top deck. All too often scale(ish) models of the EIII seems to have wire gear, no dummy, and a featureless top deck with a cheap looking gun glued unrealistically to the top (instead of being seated into the cowling). The Eindecker only APPEARS to be a simple model. I believe now it is (or can be) one of the most challenging WWI scale projects. In so many ways mine is still just a "sports" scale model.
As for the wing warping levers in the U/C well for now these are just for show. But I tried to make it sturdy enough and with sufficient movement that I COULD -- if I ever get around to it -- switch to a scale wing with wing warping.