The Crux is a great midrange out of Thought Space Athletics, slotting into that overstable companion alongside of the Pathfinder. This is going to be one that can push straight for a long time, before a decent fade at the end of flight. 
 
Flight Ratings: Speed 5, Glide 5, Turn 0, Fade 2
 
About the plastic: Ethos plastic is the equivalent of MVP's Proton, as these are produced in the same factory. These have a great feel in the hand, typically on the stiffer side and they are often semi-transparent in looks. They are one of the more stable plastics out of TSA besides Glow. These are extremely durable, and look really fantastic in vibrant colors.