About this 3D model

In makerware, you can rotate the top engine part if you wish to have the connectors switched. I have made this and it turned out well. If you move the item, please note that there are 2 pieces. This allows you to change colors of the top and bottom for a dual extrusion printer. The wheels and train cars can be found here. http://www.thingiverse.com/thing:11671