I will be using the SMW3D linear rail system. I havent really heard of these guys. But designing my own rail system will take longer, these guys seem to have a solution at the right price.

The only thing I dont like is the motors are cantilever with not enough support. And where does the screw go into the v slot rail? Is there a threaded hole in there somewhere? Not sure, cheap enough to try it out.

http://www.smw3d.com/250mm-length-c-...tuator-bundle/