Timothy, to make this work you must consider the forces exerted on the tubing. You need to get a small section of 4" x 4" perhaps 6" long. Drill a hole through it sideways that the PVC will just fit through. Clamp it to your fence and raise your bit up through it for the desired cut. Next you will need a dowel to fill the PVC from end to end. As you pass the PVC through the hole your cut will remove the material and the dowel and hole will keep it from shifting. Once finished remove the dowel and insert it in the next pipe. This method will guarantee uniform cuts.
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Mike |