Custom large CoreXY printer 350x350x700~ Input wanted

First off I'd like to say Hello, this is my first post on the forum.

I've been working on this design for some time now, going back on forth from one idea to the next IMHO its far from done. The major hold up has been the Z axis including the build plate support to driving the 2 balls screws. But i'd like to share my design just so people can use in and improve it.

Ill be attaching some pictures and a stp file for people to check out. If you want a different file format i'm sure i could post that also.


https://drive.google.com/file/d/0B0v...ew?usp=sharing