The bishop and impact are blatant copies of Rays neotat, and the valour is basically the same damn thing as well with a needlerunner and magnets instead of a mechanical stay up spring... it happens. It sucks for the originator of the design, but it happens. The only rotaries out there currently that dont steal elements from the others are the Neotats, Cheyennes, Sidewinders from what I've read, and Centris. All the others out there are redesigned versions of the others.