This works much nicer than a chop saw or cut off wheel since it compresses the end at the same time it cuts. Makes it easier to assemble the ends. http://www.summitracing.com/parts/sum-900040
That tool is akin to cheating. I wrap some masking tape around where the cut is to be made and usually leave the tape there as I put on the fitting, which eliminates any of the wires coming loose. Don't forget to oil the part that goes into the tube.
