Running a bit late on the shoot today, but we wanted to have a rail longer than a 4ft. slider. Ran over to Home Depot and quickly assembled a raised dolly track fit for the SpiderTrax Video Dolly. Everything comes right off the shelf, clamps together securely, pretty portable (except for the long rails). The stock wheels fit perfectly inside the Strut channel (same one used in the Cheesycam DSLR Fig Rig Cage). I'm a bit late, but these longer dolly shots should add more worth to this project. Ok, i'm out, but will have some fun BTS video of this shoot soon.