Printed all the items at one time but followed your suggestion of solid infill on some parts and 30% on others.
The nut is a little tight but I think with a little sanding it'll work just fine.
I ordered some 1/4" chrome bearings that won't arrive until Saturday but I can already tell it's going to work great.
Can't wait to give it to my Dad who bowls in multiple leagues here in Washington.
Also makes a decent hat for your cat but he wasn't amused. :)