The Chopper will squarely cut round and square stryrene tubing as long as you don't try to do it in a single cut. First I clamp down one of the plastic stops, and push the tubing against the stop. I make a shallow cut on one side, then rotate it to cut the next side. After making a nick on each of the four sides, then I make a deeper cut on each side then a final cut all the way through. You can get a nice square cut this way. It actually takes longer to describe it than to do it. The cuts are neater and easier to control than with a powered mini-miter saw.
Jack Burgess did an article on tips and enhancements to do on the NWSL Chopper in Model Railroad Hobbyist magazine.
Bob
