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Notching, like bending, requires thinking in an odd three-dimensional style that confuses most people but comes easily to many fabricators. Where a square or flat piece of metal can be cut at a simple angle, round tube that is angled and runs between two other tubes must wrap around the tubes at each joint. And when multiple tubes meet in a structure it is even more confusing. To make it as precise as possible we again turned to a JMR product-the company's tube notcher uses a 1.125-inch shaft supported by Timken bearings. This keeps the holesaw from wobbling around as the teeth cut into the tubing. We attached a Milwaukee 11/42-inch Magnum drill and holesaws to the notcher for reliable torque and long-lasting cutting blades.