This is an easy to print spoolholder for Creality Ender 3 and Ender 3 PRO (I think it will work with CR10 also). 

You must place a cilyndrical D5xH3 neodimyum magnet (N30 preferably) in the axis and tope, it will make an easy way to exchange filaments or parts.

The axis is for a D13 mm spools, and at this moment, I made suplements for D50 mm and D73 mm spools (in reference to eSun and Printalot brands).

I hope you find it useful. 

Happy printing.