Recycling Fabrik Refill spool adapter

This adapter works for a specific spool shape, check the photos if your spool is the same (I got the spool from recycling fabrik, so I have no idea who makes it, if you know please post a comment)

(My son was helping me so his feet ended up in some of the photos)

Hardware
The model requires 4 M4 nuts and 4 M4x70 bolts with countersunk head (check the photos)

Print instructions
Print each part once. I printed in ABS, pick a material that uses higher temperatures so the spool hold while drying.

Recycling fabric adapter - screw side - no supports needed, orientation as in the file
Recycling fabric adapter - nut side - I used generated supports for the nut holes, orientation as in the file
Recycling fabric adapter - collar - I used 5mm brim, orientation as in the file

Assembly
Press 4 M4 nuts in the nut side.

This spool is wider than the MultiSpool so a section needs to be removed. Cut the spool in the middle (where the filament goes) twice removing a section (use the collar to estimate how much to remove), no need to be precise, I used a hacksaw. Use a scalpel or sandpaper to clean the cut lines. If the wall in the middle blocking the holes remain, use a drill to make holes for the bolts.

Slide the collar over one of the spool sides.

Refill
Place the refill over the collar and slide the other spool half over it. Make sure to align the holes so the bolts can go through.

Place the sides over the hole from the outside and secure with the bolts, do not tighten yet.

Cut the zip ties on the filament refill and take them out.

Tighten the bolts, be careful not to over-tighten, you may break the sides.