Tim.
You will find that it will need driving from both side of the X axis. Maybe for plasma you'll get away with it but as a router you won't.
A lot of builders try it but it needs either a very rigid or very slow machine.
Say for instance when you get to do someting like a 3D carving and a small cutter is rapidly going back and forth just a few mm's you'll see that it just won't work.
So save yourself some trouble and drive it from both sides from the start.
You have made a good start, keep it up and post lots of pics.
Greg