TechZone Huxley J-Head groove mount tip clamp replacement

This is a replacement or the TechZone Huxley's tip clamp, to use a J-Head hotend with your TechZone Huxley.

Based on DeuxVis' remake of the tip clamp that was shared on http://forums.reprap.org/read.php?214,102464,155495#msg-155495 and measurements from the J-Head nozzle technical drawing on http://reprap.org/mediawiki/images/2/26/Jhn_nozzle_holder_v5.jpg.

As I understand the comments in the original scad by DeuxVis, he's happy for this to be used for anything as long as his comments remai