About this 3D model

How to make - https://youtu.be/N4zxyb1klb0 -Some people complained that the hole was small. So I modified the hole size of some parts from 1.98mm to 2.2mm. The old one was compressed separately. -This model is optimized for 0.4 nozzle size. -It would be cumbersome, but please print out the parts one by one. -Sometimes people ask me to send a model source. I politely refuse. -Your eyes are precious. You must wear safety goggles for safety.