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).

So I just trace along all the lines and recreated another that sits at the center (slightly to the left of original mk8 mount position by about 3-5mm) so that I don't have to mess with the printable area for x axis. For this, you just have to take out the existing fan and heatsink and reuse the longer screw again

As of now, this design would remain as experimental until I get my e3d although I already have all metal j-head, but keep changing hot ends would require a lot of calibration and rewi