Please ignore all my previous post of files. I think I have hit upon a superior laser cut version that will be very tolerant of thin flat stock.
I am making it all parametric so you can change any of these parameters to meet your needs.
rod_length-500
rod_diamete-12
strut_width-75
flatstock_thickness-5
rod_spacing-50
rod_offset-25
nut_width-5.6
bolt_diameter-3.1
bolt_length -15
nut_height-2.5
bolt_spacing-55
I still have to add protruding alignment pegs.
Notice in the picture that I have some extra rails at the bottom. If you already are using 7 steppers why not 8? I want to have the table slide back and forth in addition to everything else. 500mm x 200mm x 200mm build volume. BAM!!!