The author remixed this model.
Adaptation of the 20mm axis for the bearing belt holder.
When I received the MK4 kit, I didn't have a MK3 before so this part is to be able to mount the y idler with the MK4 kit 20mm axis.
The 20mm axis doesn't pass through the original space.
Bear Upgrade as created by Grégoire Saunier. Based on 2.1.1 (Bear Upgrade) source files.