Quote Originally Posted by curious aardvark View Post
what did you drill ?
1) Remove extruder
2) Notice the entry and exit holes for the filament in the black housing aroung the extruder gear. The exit hole must be drilled open from 2mm to 4mm.
3) Get some PTFE tube like used in the hot block. Cut one end to fit snugly against the gear. The other (flat) end must fit snugly against the entrance hole on the hot block.
4) Reassemble everything.

This is a simple mod that allows you to print flexible materials without them wrapping around the extruder gear.