You want a mandrel bender to do it properly, then you need the proper tubing, then you need the knowledge to do it, once you've dedicated the time and money on all of those, its probably the same kinda dosh and easier to just buy a pair.
@CrazyJames started
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You want a mandrel bender to do it properly, then you need the proper tubing, then you need the knowledge to do it, once you've dedicated the time and money on all of those, its probably the same kinda dosh and easier to just buy a pair.