Hi Wulf...
Thanks so much for your post. That will be Donald (Don) Ding you remember... Call Sign "Alpha 36". I'm afraid I lost contact with him and the other guys in the early 80's. Don was a charming Irish gentlemen who certainly enjoyed his aerobatics. He was also one of the pilots along with Les Zapp and John Powell who flew as the "Zap Pow Ding" wave !
Best regards...
Coff.