i ended up making them out of some sort of hard rubber/plastic bar as my lathe can't handle steel. they did a good job as they only caught fire and burned to ashes AFTER the first bit of braze went on to hold the tubes in place :D
@hma started
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i ended up making them out of some sort of hard rubber/plastic bar as my lathe can't handle steel. they did a good job as they only caught fire and burned to ashes AFTER the first bit of braze went on to hold the tubes in place :D