The rest became history. What has surprised me is how much my beaters have changed in unseen ways, while staying the same on the outside. It is still 9 inches long. I can make other lengths, but those requests are rare. All of them are superior contact sound mufflers.
Every beater makes the triangle sound better.
It was a small, but important engineering success. What has changed doesn't show. Like I said, the outward lengths and beater diameters are as set as anything can be. Demands of mass-production, and 30 years of improvements in technology have made the beater more sophisticated in its construction. I keep finding new ideas to make them better.