There is some progress on rev.2: not big but steadily going ahead... I am just completing the gearbox for the wrist joint which is one of the smaller joints on the RR1 robot (the second smallest to be exact). The picture shows well lubricated planetary mechanism for the wrist joint without the disk that will cover everything and the outer ball bearing ring that will go aorund.

Most notably, I switched from PETG to polycarbonate with carbon fiber (Prusa PC-Blend Carbon) for some machanic parts of rev.2, namely for gearboxes on the elbow and the wrist which seems to give much better results. Gears made from PC are very tough and feel like even not plastic. If I compare big shoulder and the elbow joints on rev.2 where mechanic parts were made from PETG, this is big improvement. Ovearall backlash is reduced in the mechanism and visual look and feel is much more pleasing than PETG.