Oh shit have you seen those skateboards with the wheel in the middle so they carve like a snowboard.. Theyre so sick,, i think there called flowboards?
These guys did it. It was called the "NSX" and it had a grind plate and a fixed heel. Can't find it on their site anymore, I guess no one bought it so they discontinued them.
i have a pair of roller skis and theyre fun but theyre kinda more for cross country training. theyre hard to control and they dont have any breaks or really good ways to stop