I'm still uploading a "Brass Not To Face" video showing my Gen 4 G23 from the same day. I honestly set out to make only ONE such video detailing the awesome ejection of both my Gen 4s, but that didn't work out.
I made a slow motion comparison of the ejection of both guns from that day at the range, and it reveals something I think is very interesting. Check it out.
ETA: You'll notice the spring loaded bearing is installed correctly in both guns.