3G 5D Shield

Making those old red Gen3 motherboards more like a Gen4 motherboard.

You can buy one in the MakerBot Store! http://store.makerbot.com/3g-5d-shield-for-cupcake.html

This is a shield for the Gen3 Motherboard that allows connecting a fourth stepper (for controlling a stepper-extruder) directly to the motherboard. This is my "sorry guys" for coming up with the firmware changes and that ugly cable hack that was used to connect the Gen3 EC to an external stepper.

Note: I fixed a glitch in the