Quote Originally Posted by bigal999 View Post
Also will look at moving ball screws and rails to the back and have z axis like a box around y gantry. Would that work
Yes, it would work but again not needed and all your doing is adding weight. All you need is a drop-down bracket from the top bearing plate which extends backward.

But like I said your design will work and will be strong enough so if you are happy to use that then go with it.