Removable Spool Holder

I sometimes have 3kg Spool's, but didn't wanted the spool holder to be always there... so i made it removable. Print directions like in the pictures (for maximal strength).

M3 Inserts:
https://www.amazon.de/gp/product/B08BCRZZS3/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1

Bearings:
https://www.amazon.de/gp/product/B07TB6Y9ZK/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1