I have a 1meter roll of 10mm copper microbore pipe that is rolled. I need to straighten a 50cm stretch so that can get it through a wall and solder a elbow to keep it flush against the wall. However, unlike the plastic pipe the copper is rigid so unrolling it seems like it might kink or puncture the pipe. Is there a way to unroll this and straighten it without the use of some sort of spring?