I think Terrova and Riptide ST are simular where as Riptide SP is more like the V-drive. Same screw and two wires to disconect but I had to cut power at the sonar unit in order to feed the transducer cable through the drive. The transducer end was too big to go through. My sonar was already hooked up. Had I been installing a new sonar I would have thread the cables through the drive before hooking up the power. But it looks and works fine in the garage, maybe it will stop raining long enough this weekend for a field test.