I am having to make a circle for a project from a 10" peice of 3/8 copper tubing using a lever type tubing bender. Than solder and pressure test to 110psi . I am having trouble bending it to get the circle. My circle is closer to an egg . Is there any tricks/formulas that may help me make a more uniform circle . This is only my second week as a student. Thanks for any information
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