525mm blades on a Concept 46VR?
Duelist is right about the head being bigger on the Concepts and Nexus machines. I really think the 525's on that machine will make it a really good 3D machine. We put a OS 50 on a raptor and flew it with the 550's and it flew like it was on speed. It was very hyper so we tamed it down putting the bigger blades on it.