I loved Alex English's Cheap DSLR Table Dolly, but wanted to have a longer, single channel on the sled. Follow the instructions on the original thing, but skip the 2x sled parts in favor of one of these.I have an (AWFUL) video made while using this. You can find it here: http://www.youtube.com/watch?v=1MI2z1evjPIBuild notes: I printed this on my Replicator at 80% infill with 2 shells in ReplicatorG, and it came out so rigid and tough that I'd trust any camera on it.My replicator is completely enclosed, so I didn't have any warping, but you might if you're not careful! If you want to enclose your Replicator, take a look at the fantastic: http://www.thingiverse.com/thing:23386. If you want your wide / large Replicator builds to come out well, take a gander at: http://www.thingiverse.com/thing:23257.