I refuse your Master Spool and substitute my own.
Here you have a so-called Master Spool for Refills of Das Filament (dasfilament.de) 100% AMS compatible.
Das Filament offers a spool available to download but you will need more than 300 grams to print it. This is because the way both halves of the spool are attached to each other. I went for another approach to that and instead of designing and printing a ginormous thread, I just used 4 M3 threaded inserts and screws.
The total weight of this spool including screws and inserts is aprox. 150 grams.
Try it out!