Say you were trying to reuse four collars from an old razor for a restoration and one of them was in worse shape than the other three - where would you put it? I'm not sure of an easier way to name the pin locations other than show-side pivot, show-side wedge, back-side pivot, back-side wedge. So, that's also a question - is there any convention for naming the pin locations? 1st base, 2nd base, 3rd base, shortstop?