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Trying to layout this using the helix tool as a path then using sweep but the channel "side rails" are not coming out symmetrical. I put the helix centered between the channel profiles assuming that would be the most accurate but it's not forming correctly. Autodesk has an "app" called advanced steel where this stuff is automatic, I didn't see where Brics had anything comparable in their 3rd party store. Does anyone know of a program that might work or advise me on a better way of laying this out? See attached pic for reference, thanks!