A spool holder with a filament sensor mount.

It uses the original flashforge's metal spool holder and extends it to a better place.

You need 4 M3x16 screws with 6 nuts and 6 washers, and 2 original (long) M3 screws that were holding the filament sensor.

You'll also want to trim the original filament pipe, because it becomes too long after the extension.

You can see the assembly in the photos :)