Filament cutting knife

much more stronger arm added. 2022.10.31

I copy the styles from ERF_filament_cutter, the whole part is lighter than before, and compare to the ERF version, in my version you can use the original CW2 part.  2024/1/29

part updated , an eye plate added for “SB Dragon TH Rear CW2” to prevent arm loose.2024/3/3

make the arm shorter, so it will not conflict with the manual screw. 2024/5/1

knife added