Does anyone know how to remove the little ball-bearing in a Sinar F standard? It's the ball bearing that helps you find and sort of lock the default center setting.
I found that it's actually chewing up what underside of my friend's standard and as a result, moving both front and rear standards laterally is not only a painful process, but extremely rough and imprecise.
I've already smoothened the previous rough edges and cleaned/greased the slots, but the ball-bearing is not helping any.
I found two little grub screws at the back of the frame, but removing these only serves to loosen the small round platform that the ball bearing is mounted in, and that platform doesn't seem to want to budge past a certain point.
Any help is greatly appreciated.
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