Pen Attachment/Clamp for Ender 3 (Neo)

This is a two-piece split clamp pen holder that mounts directly to the printer head without requiring additional screws. It allows a standard pen with a diameter of up to 10 mm to be securely attached for plotting or drawing applications.

The holder is optimized for simple printing, straightforward assembly, and reliable pen retention.

This has been tested only on an Ender 3 Neo, but it most likely will fit the regular Ender 3 (let me know in the comments).