The hub for a game of Mexican Train dominos, with configurable domino dimensions and number of slots for train tracks. See also http://www.thingiverse.com/thing:15822 . This is a single piece, with 9 slots by default (8 players plus the Mexican train), whereas that one has 4 separate sections, and only 8 slots.Measure your dominos, recording the measurements in the SCAD file. See the comments for those and other parameters. Print. Put a doubles domino in the center hole, and start train tracks from the cutouts on the sides.