Quote:

I have seen rolls of soft copper straighted by stretching. Unroll,clamp to tree or something unmoveable and pull with a come a long or vechicle. Will work on soft copper,don't know about steel.




That's gonna change the diameter of the tubing, very bad idea and advise.

Roll it out on the floor and you will be fine.
I have bought and installed 100s of rolls of copper tubing in my time, as I'm in the propane business.