OneUp/TwoUp Extruder Housing Assembly

I started with a housing found here and made some changes. I removed the "bump" where the nozzle mounts because this made it very difficult to clean-up this diameter. I changed the lever to exit out the side to make it MUCH easier to use and get your fingers away from the hot-end. I added a motor spacer as a separate part to help keep the motor heat away from the housing, to give moving air another place to exit and to make it easy to use the original screws.

On the carriage part, I took an