The RigWheels RailDolly is the perfect option for professionals who use large video/film cameras. The RailDolly has a larger footprint than some of RigWheel's other options so it provides a bit more stability when using a full-size broadcast camera or similar. The RailDolly is also a good option for critical audio recording environments because operation is silent.
This configuration uses a RigPlate, two RigAxels and two different types of skate wheels. Another capability with the RailDolly is the ability to use it on square or rectangular rails. Square or rectangular rails can be much more rigid than tube/pipe so if you're going to be putting a BIG camera rig in motion this is an ideal option.