Hic Hic X-Carriage mount for E3D clone

This replaces the metal X-carriage that comes stock on the Hic Hic acrylic printers with a much lighter & more compact design that is used in conjunction with a bowden extruder.

Like the original designer Tech2c noted - this gives a dramatic improvement in print quality by reducing the weight of the x-carriage and maintaining a more uniform flow rate.

The clamp is a perfect fit for the Chinese E3D clones, and is designed to fit a standard 40mm cooling fan blowing over the hotend cooling fi