It is still a test version!!!!

This design only suit for phaetus dragon or any other hotend which tight by four screws on the top. And you have to use CW2 extruder to make sure the knife working correctly.

you don't need to modify your CW2 extruder or any extra “arm” parts. only one hook is enough. 

The “cutting part. f3d” file is a “shape” solid part, one is for you to cut, one is for you to add. (use combine tools). you can use it to modify your own hotend module.

by the way, my knife size is 35.7x5.8x0.5(#4).