First time build - Steel Frame CNC Router

[examorph]

I also want to be cutting aluminium, so updated the models with the longer carriages (CAD models from here) and replaced the rear hard stops with large bolts (will use a steel plate spacer on the inside of the box section to support these). One thing I cant figure out is if I was unlucky enough to hit the hard stops, would it not end up distorting the frame and cause more problems?

Anyways, the larger carriages didn't make that big of a difference to the work area and seemed to fit OK with the existing setup (slight overhang though) so all in all, seems to have worked out ok.
Attachment 17484Attachment 17485Attachment 17486Attachment 17487Attachment 17488
I have shown carriage spacing for each axis. Can I reduce or need to increase it anywhere?