If the original spool is cardboard, you can pull the sides off one at a time then use the spool mentioned above or any other version of reusable spool. The above is touted as using less filament, I’ve printed 3 sets and they’ve worked fine for me. I’ve transferred 3 or 4 spools this way so far. Pull one side off, while taking care to not let it uncoil, slide in the hub of the reusable spool into the cardboard hub and while holding things together, flip it over. Now pull the other side off, put the other side of the reusable spool in and turn it to lock. I wouldn’t worry about the cardboard hub not fitting perfectly but there are shims you can print if it seems excessive.
3 Likes