I always thought someone should make a good quality rod that can be changed back and forth between casting and spinning. I don't think it would be to difficult. A dual reel seat, top and bottom. For casting, insert the trigger below and the reel on top. For spinning turn it over and insert the reel on the bottom and a slug, or spacer on top....don't know all the dynamics of it....but sounds possible, but it would have to be a quality rod.