I had this issue plague me for several months. Please see:

http://3dprintboard.com/showthread.p...agon-vs-E3D-V6

I tried numerous things and finally found that the diameter of the Greg Wades Extruder was optimized for 3mm filament. So the connection from the hobbled bolt to the hot end was to wide. I had to use an aluminum piece to narrow it down to 1.8mm.