This is a tricky one guys and gals. Let me describe what I am trying to do. I am trying to model a flame cell for a flame cell arrestor. The "cell" is made of SS. The best way to describe it is that it looks like a rolled up sheet of cardboard. Okay, now that you are confused....follow me here....think of the pattern you see if you take a cross section of a piece of cardboard. You know, it looks like a wavvy piece sandwiched between two flat sheets. This is what a flame cell looks like but coiled up around a piece of sched 40 pipe. Imagine taking that piece of cardboard and rolling it up around a piece of pipe, then looking down from one end you see all the wavvy crimp. Now...for the modeling problem, I need to take a spiral sketch with very specific (proprietary) dimensions and add very small "crimp waves" in a linear like pattern from the start of the spiral to the end. Any ideas how i can do this? If you are totally confused please let me know and i will try to post a generic photo or hand sketch of the crimp. Thanks