Thanks, that helps a little bit more. But, still I would like to see a diagram of the outside of what most people refer to as a 7 pin sidelock action (either back action or bar action) as most that I know always seen to have at least 8 exposed pins and 9 if you count the tumbler axle.Is the axle counted as pin? The English gunsmith that I took my sidelock to this weekend counted it as a pin to come up with a nine pin sidelock in his definition.

Guess I am dense when it comes to these pins but I bet there are other readers just as confused as I am.