Extruder CTC

Hi,

This is remix of "Dual extruder CTC". I just separate base plate for easier printing on ABS an for easier maintaining in case nozzle blockage.

This spring works perfect. 2 springs needed.

http://www.banggood.com/10pcs-Spring-For-3D-Printer-Extruder-Heated-Bed-Ultimaker-Makerbot-p-995375.html

And the bearings:

http://www.makertronics.co.uk/3d-printer-u-bearing-type-fz0463-4x13x4mm.html