Solidoodle X-carriage and new printable extruder assembly.

This is for advanced users only, I will not be providing detailed instructions on assembly at this point, as it is Version 1.0 and requires wider testing then just me. I built this for my Solidoodle 3, and I am fairly sure it will works on a Solidoodle 2 but need confirmation.

This is a printable replacement for the Solidoodle x-axis carriage and extruder assembly. This uses few pieces and offers more precise and permanent adjustment of the rear pinch blocks for the x-axis carriage. With t