Maybe it's just me, but I had issues trying to get the focus motor calibration to work properly. It would fail to find the end points, and once hitting the hard stop, the motor would keep pushing and pushing. It worked a few times, but 95% of the time it didn't work.

I saw PhotoGear in Auckland City and one of the guys there worked through this with me and noticed that in some of the manuals, there was an elastic-type band that was shown in the images, even though none came with the RS3.

We were confused but after a while, figured out that the band pulls the lens and rod together to help it find the hard stops. So in the end, we found out that holding the lens and rod together using your hands was just as effective and solved this issue for me!

Hope this can help others out there.