Printrbot Plus 1404 Laser-cut Improvement Pack

This is a package of all the improvements I have made to the Printrbot Plus 1404. These can either be laser cut (via the provided .DXF file) or 3d Printed (via the .STLs).

Included in this package:
- Extended X-Gantry for use with easily-accessible fan and the option to use E3D hotend/fan
- Custom dual-zone fan system which cools the print and the extruder separately (short and long versions included)
- Improved design of what I call "X-Ends" which have the Z-nuts attached and move the ga