welding linear shafts

Considering that linear shafting, even Thompson, is reasonably priced unless you want mounting holes drilled and tapped...

Any reason I can't weld mounts on the shaft? Assuming I take reasonable precautions to keep the shaft clean?

I realize I'll be changing the hardness of the shaft with the heat... but how many cnc machines fail because the shaft isn't hard enough?

I'm more concerned with the bending of the shaft caused by uneven heating, if I was to weld supports in the center of the shaft (for use with open bearings)

Richard Spelling, http://www.spellingbusiness.com/boats
From the muddy waters of Oklahoma



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