Open wheel four bearing fidget spinner

I've been trying to find an 'open wheel' spinner without success, so I made this one.
It's a quick and easy print.
Requires four 608 bearings.
Sketchup design file included.

Please post a picture if you print one!

Update 161216: three bearing version available - http://www.thingiverse.com/thing:1974338

Update 170202: hole for center bearing is a bit bigger, allows for a better fit when printed with bigger nozzle.
Better clearance for the outer bearings.
The halves now join at the center line of the bearing.
Updated version files: Fidget03.stl/.skp