I had my COE done a few months back and it cost about $110 and change at my local auto place. He did it in aluminum pipe. I was helping out and I noticed how many times he had to swing the tubing cutter around to cut the pipe. He said aluminum takes about 30 spins while steel only take a few. I thought that was odd since aluminum has a lower density then steel. My system was less then 10' so that may have made a difference in the cost.
Jeff
