Homemade Steam Engine - Two Cylinder steampunk style HD

This is a little steam engine that I made a couple years ago on my Grizzly benchtop milling machine. It is a two cylinder with rocking style cylinders that rock to align with intake and exhaust port at the correct timing to spin the motor. I put a little valve on it to control the throttle and routed all of the ports through the aluminum stand. This bad boy has dual exhaust of course because that is awesome. Pretty cool project if you have a little milling machine and want to get familiar with it.