pretty sure it's sami only, but could be wrong. (HEY...I'm only human...lol)
I know someone that has one and it's a really kool unit. He got his primarly for flat towing his sami, it's SPUA and a really tight fit to get under there and drop the d-shaft. Now he just pulls a little lever and he's ready to go!
I'd love to have one, but a little out of my price range at the moment