Thank you a bunch. Back then I had tried about everything available including modified props. There was just something special about the 11.5x6 (can’t remember if they were Wide - I know not EW), at least when used on my Music design of that period. I’m thinking to recreate my 1985 Nats machine and am trying to get all the original bits together. In a stroke of luck I found an original Big Art grooved muffler for it.
Dave