I cut all the regulation 1-5/8" x .125" round steel tubing for my
roadster roll cage with one of Speedway's joint jiggers which uses a
1-3/4" hole saw in a 1/2" drill press. I followed the model in the SCTA
Rules and Records Book. ONE hole saw did the WHOLE job, but Neil you
are right, it ain't easy. This is a long job. The square tubing would
undoubtedly be way easier for the frame, but the roll cage proper must
be made of round tubing, I believe. Bill
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