Not unexpected news, but nevertheless very very sad. Danny taught me to fly more years ago than I care to remember. In latter years he did a couple of instructor renewals for me, the most recent only last year. By that time I believe that due to his illness he was restricted to flying with qualified pilots only(i.e. instructor courses,renewals or similar), yet he still exuded enthusiasm. Needless to say the end of my last renewal finished up with him doing a barrel roll (in an aerobat) as immaculately as ever, not to mention having taught me quite a few things that I didn't know! If I can remember only half of what he taught me I will be more than happy. Sincere condolences to his family. He will be much missed.