sdandrea1 The other thing that causes my doubt is the number of quality shots and good rounds I have had with pure junk in my bag.
But, we've never read about any under Par rounds here. So, you're still making a lot of bad shots. Even when you shoot a 75.
Spineing/not spineing, bad swings/good swings, perfect strikes/mishits, good weather/bad weather......any little thing can contribute to a good round or a so-so round. I'd leave nothing to chance, as Chad says.
There are probably only a handful of Pros that will say if their shafts have been spined/FLOed. They also are probably the only ones that do know if they were done. Their clubmakers would be the ones to be asked; and if I were one of them, their shafts definitely would all be aligned exactly the same. Whether I believed in it or not! If there is even the remotest of possibilities of it helping, and costs nothing, it should be done, imo.