Originally Posted by
ArchaicArcane
Yeah, I just went and pulled a top for the 411G. The front one is the inner knob. Put it down and you have a better chance of the back one moving. If it's fully at the top, it tends to "jam" that whole mechanism from letting the other side turn. Ditto if the left (back) one is all the way up.
I shot some video of what these look like when they're operating, and am going to try to figure out how to upload to YouTube.
that would be very helpful. I have tried moving the one that moves into different positions and trying the other one, but so far no luck.