Working Steam Engine with Throttle and Reverse

I decided to take on the challenge of a reversing throttle lever as I thought it would be more fun than running over to the air compressor or moving tubes. Works well see videos! If you make it post up a pic! See the instructional video and operational video.

Update (11/9/15): If you want to use this engine to drive accessories print the power take off pulley and longer crankshaft. Mount the pulley so that its grove is further from the crankshaft so your rubberband clears the pennies on the flywheel.

You will need one of each part.

Update: 11/9/2015

SEE THE NEW VIDEO!

I have added longer crankshafts and power takeoff pulleys as well as heavier grooved flywheels to be able to drive other accessories or have the engines driven as pumps. The new flywheel fits on the crank without as much slop. With the heavier flywheels the engines will run as slow as 180 rpm on 20 PSI. The video show this engine driving (http://www.thingiverse.com/thing:1107379) as a water pum