Gear bearing keychain fidget (keychain ring not included)

I wanted a keychain fidget version of Gamma4D's Perfect Gear Bearing v2, so I added a post that goes through the center and gets held in with a split ring (not included). The post is large enough to hold the center gear in place while the others spin around it.

The original advises using 0% infill for the gear bearing. I welcome printing tips for maximizing the strength of the center post.

Center post added to attach a keyring and for holding onto while spinning the gears.

This is my first remix, so please give me a heads up if I have messed up any logistics or etiquette.