PLTW IED Train Model

Train model made in Project Lead The Way Intro to Engineering Design
I made this based on the parameters they provided, and take no credit for the design.
What you will need:
1x Train Body
4x Train Wheel
2x Linkage Arm
1x Train Hitch Spacer*
--------- *This is the "magnet" STL, as it is supposed to be a magnet.
4x Axle Peg
1x Hitch Peg
4x Linkage Peg
1x Train Stack
1x Cow Catcher