Creality 3kg spoolholder arm

This part " just shorter" comes with the creality printers, here i have modeled it, but also extended it and made the end slimmer to fit inside a 3kg spool.
Why the holes in those are smaller, i dont know, but here we are.

Easy to print, but requires some glue to keep parts together. plastic bond would be best.
also, rotate it so the inner walls are vertical to gravity as the spool hangs on..