Master Airscrew and their new slimmer faster props

That's right, it isn't just New Coke, Nacho Cheesier Doritos, and new Chewy SweeTarts.
A bunch of Master airscrew props are now sold as "Now with narrower blades for a bit more rpm!" Just Shoot me already! I finally settle on a prop that does what I want it too, a critical part of my new precision stunt hobby, and had my LHS order spare props. My current old wide one is... lets say weathered...and old, but thankfully still safe... mostly. When my new props arrive, if they are narrower for a bit more rpm, I'm going to bolt one on my Shoestring and fly it to Cordova California and crash through their plate glass facade and demand old stock or die!