Why not? I wanted the 2up and the wife wanted the 3up so the only difference in the bottom hull is the extended rear deck. I want it to stand up easier for tailstands. Good thing is if I don't like it off 12 bolts and its right back on.
I'm going to take my new 3 up out a few more times before I do this. I figure I could judge better later. Is there still a provision for the rear step? With the cover off. And will a two up seat fit a 3up spark. Want a black seat anyway.