Matt's minimalistic j-head mount (v7)

This is my version bowden x carriage and j-head mount for prusa mendel.
I based on http://www.thingiverse.com/thing:45883 (thank you for openscad file I reused).
My main plan was to create 2 X-carriage prusa mendel

main changes:

• allows symmetrical both side 2 X-carriage belts (see part: http://www.thingiverse.com/thing:128514)
• moved hotend 3.5cm higher
  v6:
• easier mount of bowden tube

Update (10/19/2013) from v6

• issues with wobble and not tight grip on linear bearings forced me to create clamps to hold tight to bearing
  -cutout for hotend cables.

Update (8/06/2013) - printed parts and assembly - pictures

Update (8/05/2013) from v5:

• separated bowden tube mount and j-head mount from carriage

Update (7/30/2013) from v3:

• moved up by another 1.5cm
• slim down design, better positioning of belt clamps, added one belt clamp
• fans mount straight