Should I summarize everything? i will say this though Rocky the Griswold Rep was an interesting and good guy. Has a long history in the Industry (40 years) back to early HARDIE days and prior to that some. Was part of the initial SIGNATURE CONTROLS group. Unfortunately I was talking to him on a cell while he was driving across the Nevada desert so we lost contact a few times. I know the pin and the way it is cut is very important. He says when it gets down to the last part of the closure you can actually hear the water shhhhhing through right before the close. Absolutely no slam. They have gotten much more active on the HVAC side of things but with the same valve design principles. Always a good thing to follow up on queries. Never know where they will lead or who you'll meet. He's going to come by and visit my booth at the show. Now every other valve out there follows a very similar design. Slight variations but in general unless somebody has a valve they want to bring up follow the 80/20 rule as described by Jess Stryker.