Keith,
You are now correct. I had a "Carousel", and indeed, it is one of Charles Mackey's airplanes. Jim Vorholt won Jr at the 1960 Nats with his "Carousel". The Mackey "Crusader" is an RSM kit.
Charles Mackey also designed the "Gobbleswantz" that Bob Randle had his Nats win with.
That makes 3 Boomers by Mackey.
Bob Randle had another boomer later on. I can't think of the name right now, but Bob sent me the plans a few years ago. Someone had one at the Nats 6 or 7 years ago. I am not sure if the airplane was a Randle design, or if it was co-designed with Charles Mackey. I am also not sure if it was published.
You are also correct about Jack Sheek's airplanes. Jack's boomers included the "Torino", and 2 versions of the "Sea Vixen".. One CL stunt, the other one was RC. I have the plans to both.
Jack also published another stunt boomer called "BeWitched" in 7/72 FM.
BTW, I talked to Jack about 6 weeks ago. Jim Vornholt moved back to Indiana. He was at Jack's house when I called.