v2 50mm inside spool adaptor for hardrive 25.5mm bearing

This is version 2 of my 50mm spool adaptor for hard drive filament spools. This one is thinner and not wonky! It will take less time to print as less material is used but remain perfectly strong.
The outside rim is 10mm high and it's enough to use this adaptor directly inside the hardrive without removing the bearing mounted on a plate.
v1 version
http://www.thingiverse.com/thing:378071