Slim Direct Extruder for Chinese J-Head Hotend

Current picture is of version 6. The little triangular pieces of tape on the drive gear and skate bearing allow me to monitor filament feed (they should both be rotating).
Changes and Improvements:
1/1/15
*Re-aligned filament hole to match up with M7 drive gear
Tension screw lines up correctly.
Enlarged clearance for skate bearing - spins freely now, no binding
Thickened section for thread insert for tension screw
Added additi