Atom's Filament Spool Side Adapter

I noticed that when I load my printer with a second spool on (my) right side, the part that hold the spool don't have good grip, which cause the spool to touch the frame and not move well.
This is because that side of the spool have much bigger diameter.
So I designed a simple hollowed wheel to fit there and reduce the diameter so the printer have better grip.
I don't know how other printers hold their spools but if you had the same problem then here's a simple solution :)