Paper pattern on the left - test piece in the center - original tube that I made the pattern from on the right. The second tube I cut was a mirror image of the first. I used the first as a pattern by wrapping a sheet of paper around it and cutting off the overhang. Unwrapped the pattern and wrapped it in reverse on the test piece. Worked like a champ. Cut three hours (half the amount of time) to cut the second one.