Last summer I bought a swivel seat base and installed it into my 05 lsv. If you know about 05 lsv is that is has a weird arm rest that juts out and stops the seat from swivelling and no matter how much you cheat it to the one side it wont fit. So I have come up with this solution
http://i.ebayimg.com/t/Garelick-EEz-In-75090-01-Marine-Low-Profile-Seat-Slide-and-Locking-Swivel-/00/s/MzI1WDUwMA==/$T2eC16hHJF8E9nnC9cJSBQ10CKg0+w~~60_12.JPG

This way I can install it on an angle that will allow it to be far enough away to swivel!