I am very sorry for the loss of your friend. I first heard of Charlie Cunningham in the mid-80's when I started mountain biking. The wrenches in the shop I went to referred to him as the "Mad Scientist of Marin". I never met the man, but I enjoyed reading about him, his inventions and his contributions to cycling. It was devastating news to learn of his bicycling accident in 2015 and the TBI he suffered. My thoughts and condolences go out to Jacqui Phelan and his family and friends.