I have a selection of spiral blades. They remind me of a bunch of lures in my tackle box. I rarely use them, though I do occasionally. I have played around with them, but I really just prefer flat blades, primarily scroll reverse, mostly #3’s, and if truth be told, I like Flying Dutchman over Pegas, have little use for Olson, and I work with a wide variety of hardwoods and Baltic Birch. Just my preference. That said, work with what you feel comfortable with, which is my advice with lures, too. If you have a negative attitude about green plastic worms then you will get worse results than your results with your favorite black worm because you fish It differently and less patiently. Same with scrollsaw’s blades.