Just got my new upgrade knob today. Its a nice improvement!
And the mounting surface is flat, unlike the older one which had
the tension screw sticking out a bit which was difficult to use
with my (arca swiss) plates.
Here are two pictures of my setup:
http://cpicture.net/spaces/nn1.jpg
http://cpicture.net/spaces/nn2.jpg
Viele Gr?º?üe
J?ºrgen

