MakerFarm Prusa i3v Heavy Duty X Carriage for Bulldog XL Extruder

MakerFarm Prusa i3v Heavy Duty X Carriage for Bulldog XL Extruder. Update: 12/11/2018 - Completely revised this design. Moved the extruder mounting closer to the X axis rail. This reduces deflection under accel/decel. Added slots to the extruder mount location for added compliance - Removed the fan bracket from the X-Carriage and added a stepper mount fan bracket where a small squirrel cage type fan can be mounted. - Changed the material type to ABS from PLA to prevent deforming un