This is a pretty straightforward part for most printers. The most challenging parts are the radius on the bottom edge, and the overhangs. Luckily, both of these are cosmetic.
Also, I have printed this at 30 and 100% infill. I actually prefer the 100%, because it gives a good weight to the yo-yo. But if you like a lighter yo-yo, keep it lower!
7/29/16 6 PM - Added files
7/29/16 10 PM - Fixed small misalignment of board alignment pegs. Parts printed before file fixed should still work.