Dad raced Harry Brinkman's Desilva C Mod Hydro in Soddy Daisy TN at the Mod nationals back in, I think the 80's. Harry was having some issues with flipping the boat, like nearly every race, and wanted to know what was wrong. Dad put our engine on it and went out and led the field well on his way to the National Championship when the gearbox sheared from the housing and the boat crashed in the middle of the backstretch. Dad said it was a decent ride, needed some different set up than conventional wisdom when the brothers asked him how the boat did. I think Harry sold the boat as he was more of a runabout guy anyways. The man knew his way around the course in a DeSilva runabout.