I don't detect any binding. If I operate the primaries alone they seem ok to me in snapping back. When I operate primary and secondary to wot, it seems the primary is trying to help push the secondary closed when I let go. If I don't attempt to wind the secondary spring at all, it is loose, has no tension at all and both shafts hang open in my example above. If I operate the secondary alone it just hangs open when I let go. I tried to wind it once, and that helped, but not enough.
Should I have to wind the spring in the first place or should it automatically have the proper tension when I just slip it on?