Ultra Precision Alignment of Guide Rails

I need to hold .001 in. xyz tol. for a 4 meter long set of four guide
rails. This is a heavy gauge formed bend/welded sheetmetal system.
This type of construction was designed for low cost and I need a low
cost method to achieve the listed tolerances. I am looking for ideas
to ether fabricate the structure with the listed tolerances or find a
good way to align the rails post fabrication.
Anyone have experience with a problem like this or good Ideas/
technology that can be used?
Reply to
rebcalale
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Over what temp range? Is this a realistic requirement which can be realistically verified?
Reply to
me

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