This past weekend I was in Ohio with Billy working on trimming the new plane. Every time I go there I see things that are so impressive and shows how many years Billy has been developing engines and planes. He shows me all these different planes and I ask why he changed things on this one compared to the earlier one... and he tells me the reason and normally he was just curious what would happen. Well this weekend we were talking about tune pipes. And he showed me three bins full of prototype tune pipes. (Over 150 prototypes) Showing all the experiments that helped him arrive where he is today. Just thought it would be fun to share.