c j-there was maybe (?) a slight noise difference w/ the quick spins being louder but it really wasn't that significant......they are MUCH quieter than helical feathers.
Rangeball-Not really that much work.....Like I said I'm a teacher so during the summer I have to find something to do between tee times
I had to make sure that they were worth the $$$$. They are so it was time well spent.