Quote Originally Posted by jcb121 View Post
As for your ball screw mount, the amount of material used in trying to get it hang on the side of the side of the box section will almost be the same as putting the ball screw and rails next to each other.
Have a quick look at my build log and you'll see what I mean.

It will also make it easier to align.
Not sure what you mean here JCB.? It looks very similiar to your drawings in this thread. http://www.mycncuk.com/forums/router...-mark-2-a.html

I don't like ballscrews running along side of rails on flat horizontal surface because they become chip traps. With screws on side chips fall away and it's easy to put a chip deflector cover and help keep clean. . . . Alignment isn't much harder. It also means orientating top rail in it's wider weaker position which means more supports so there's actually more material needed.!