MysteryAlabaster ... Make this modification to your extruder to aid in the feeding. http://www.thingiverse.com/thing:238638

This mechanism keeps consistent tension between the filament and the drive gear while reducing the friction. There is also added support between the drive gear and the extruder to keep it from buckling.

If you still run into problems feel free to email me and I'll help you out further.

Stan
stankulikowski@fennerdrives.com