Mexican Train Hub with Train Engine

This hub can be used to play the game "Mexican Train". The inner gap is 26 mm wide and 52 mm long. The design was inspired by the [Mexican Train Domino Hub](https://www.thingiverse.com/thing:2740558) by [Steve Thone](https://www.thingiverse.com/sthone/about). I redesigned it to have a better fit on the domino pieces and to have more space for the train engines. I also added an engine in a fixed position, which represents the "Mexican Train". For this engine I used the [Mexican Train Engine](https://www.thingiverse.com/thing:2815232) by [Charles Bess](https://www.thingiverse.com/cebess/about) and changed it a bit to increase the printablility with FDM printers.
The print came out well with an Anycubic i3 Mega, nevertheless I did some small changes in the design after printing, therefore my pictures are a bit different from the stl file.

Update 9. Jan 19:
Added an STL file without the train.