Hi rkrig,
flying the aw60/90 540,have os91fx up front,15x6 zinger prop,sig 15% fuel,had to do a lot of mods. to get it below 8#,needs os 108 to fly out of a hover,knife edge like a brick,super stable plane will do any trick in the book except a long knife edge,comes as arf only,would not buy this plane again.