Here only test files.
ALL FILES HERE: https://www.redpah.com/product/4089 (with a small contribution)
Like the M200 version (https://www.redpah.com/product/4069/) but with the specific connector for the M300 printer.
VIDEO (M200 version): https://youtu.be/l7WOmbPqmVg
With this special spool holder, the reel of filament rotates almost without friction and
REDUCE THE EFFORT OF THE EXTRUDER MOTOR (more hard with 2 Kg filament reels).
Thanks to the quick lock-unlock system and the LENGTH OF 70 mm, it is suitable for all types of Zortrax reels also for the 800 gr of M200.