Toy Train for Wood Tracks

This is a variation on my original train: http://www.thingiverse.com/thing:11101 This version has wheels that work on a normal wood track (also print-able on the 3D printer here: http://www.thingiverse.com/thing:8805) Another option is available here: http://www.thingiverse.com/thing:4041

I think the original ones, on track that looks like RR track look a lot cooler, but from a functional, push them around the track, standpoint these are a lot better. They work as well as the magnetic ones