I picked up a linear bearing rail system through my friend Andy to trial for video and time-lapse photography. My first test was just around the house. The bonus to this over traditional sliders is these glide rather than roll or slide, which gives a very smooth movement. 

I had an acrylic base plate made to mount a ball head on to the bearings block and picked up a Benro BH-1 with quick release from Apix Photographic Supplies to mount my camera. Will post separately about putting the rail together. Above is the small demo clip put together from the test. Quite happy so far with the results.