You will have virtually no induced flex in your pipes. Overkill for sure but if you want to, the slower accelerations are the only issue. If the rod is heavier but has more cross section, does it sag more on its own weight? hmm….Kind of unrelated but I wish carbon fiber worked. Wonder if you could take 2 rails where the CF tube has an OD the size of the ID of a thin walled stainless steel tube.