In the latest warren miller film, there was a shot of the guys using some sort of dolly system where the rails were lifted up off the ground by what looked like super heavy duty light stands. The camera rode on a "mini dolly" of sorts that I believe had a built in levelling bowl....any ideas on who makes something like this and/or where you could get one? I was thinking of trying to DIY one, but would still probably end up buying the stands for it....