I am lucky to have an old but excellent floor mounted hand bender at my disposal and a lathe to produce dies in any size we might need... for a recent project we turned out a 4 inch die for the 3/8 tubing and it is so much faster and easier than using the hand benders, especially when you want to prep larger quantities of tubing for more standard applications.
It's main job is for bending frame tubes (that need to be filled with sand before bending) and some of that can be pretty extravagant.
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