Geeetech Carriage Compatible Groove mount

I created this based on someone's else design here http://forums.reprap.org/read.php?406,484958,507546#msg-507546. This is just an extruder mount to make the mk8 compatible with j-head groove mount also compatible with the link to the original design.

The original design were off to the right by the designer because he wanted to have the motor rest on the hot end mount but I don't prefer that because I would lose some print volumes by about 5-10mm (which isn't that great to be honest).

S