Narrow Gauge Powered Bogie Set

This bogie set is designed to be compatible with the model railway gauge I am using for my [stop motion mine trolley](https://www.thingiverse.com/thing:2396349) and [mine truck](https://www.thingiverse.com/thing:2538327). At this scale the track gauge is 36mm between the inside edges of the rails. These bogie sets will be used in a number of other projects but I felt that as a standalone project they might be useful to others. The overall dimensions of a single bogie are; 62mm wide, 80mm long, and 25mm high. I have a 1:24 scale version of this [here](https://www.thingiverse.com/thing:2561780). This particular bogie set has been used in [this Railbike](https://www.thingiverse.com/thing:2690349) project.

The details were designed based on a large number of powered bogies for railcars, and diesel locomotives. I wanted to create a bogie set that looked plausible. I was also keen for the arrangement to give the impression of being an electrical drive.

The models here inclu