Its a Remix of Bear Proyect of Gregoire Saunier with his X axis and Lineal Rails of Comunidad Maker 3D (Telegram Group).

I choose / prefer this mod:

The holding of the bearings is more reliable, you just have to tighten until the plastic piece closes and stops. In the CM3D or Caribou you can overtighten until the plastic pieces break.

Then I did the remix, I choose the best of each model, lineal rails of CM3D and clamping bearing system of Bear Project.

You can choose 2 options:

• Idler with Prusa Pulley.
• Idler with zaribo pulley and Its looks aligned X belt.