Sequential shifter for sim racing

This is a sequential shifter for driving simulators. The shift feeling is imitated by two bearings following a track, preloaded with a spring. I think the bearing track come out really good, this is the kind of shifting feel that I wanted to achieve when I started this project.

In the video you can see how it works:
https://photos.app.goo.gl/fvwjAALshejXzDWe9


The bearing size is 15*10*4, like these ones:
https://www.ebay.com/itm/10-PCS-6700ZZ-10mm-x-15mm-x-4mm-Modle-Sealed-Metal-Shield