I agree with both you guys and I'm not disputing any of you, but for my sake let's go over semantics just to make sure I understand everything:
If we were to propose a phylogenetic tree of clamp bases, we can start with 2 nodes: glide clamps and swivel clamps. With the swivel clamps we can branch off into two more nodes: cone-lock and spring-assisted. And from what I'm gathering from this thread I made, spring assisted can branch further to quick-action and switch action? Is that correct?
"If you are racist, I will attack you with the north." -Abraham Lincoln.