Spool Insert. (FLSUN QQ S Pro) + Other

Designed a spool insert to fit within 1KG spools so that they turn smoother when printing.
This one fits most 1KG spools and also fits nicely on my FLSUN QQ S pro.
(using the default Spool holder thats on the top of the printer).

The same insert also fitted on my CTC dual printer ( after i printed a spool holder).
(so may fit others)

Both allow the spool to turn smoothly without it making a huge clonking movement.
(improves print quality).

Dimensions of part are

Hole in center is 24.26
Diameter is 57.40

The centers fit snugly, and can be removed easily (once you finish the spool).