Dog rings

Just received the new dog rings from the outfit in Calif.  Below is a photo of what I think as the 3 generations of dog rings.  The one on the top is what you would find in the original Hewland DG300 gearbox.  The center one is a much later version made by Hewland, the type I've been using. On the bottom is the one machined in Calif.  It's a little different, only one way to see if it's better.  Go racing.