okay - how about something like:
I tied to keep the table support (the cross frame thing in the middle) as long as possible to distribute the strain a bit but I'm not sure if that would really have any effect. I could brace the bottom of that frame as well to keep it from bowing - that should help the rails from bowing shouldn't they?
The only thing I don't like about the fixed gantry is that you loose soo much table space. But if it has to be done then
I was also thinking that if worse came to worse - could I put some plastic shims on the top of the supports and under the table.
I would put the screw in this design in the middle of the table - does that seem right?
Am I on the right track here?
Boy you all are going to be so annoyed with me by the end of this