i got a hanger 9 tango i put in a FA-82a gk its all together. The CG 4 to 5 in. back from leading edge at the wing root i putt it on the CG its right in the middle 4.5 inches im holding the batt in my hand thinking about were to put it .um i found A place in the cg line but its up top side . the saito 82 is 462G 16.2oz the Evolution 52 Engine (Only) Weight: 411 G 14.5 oz the Evolution 46 comes in at Engine (Only) Weight: 390.G 13.76 oz t the 46 Muffler Weight:3.20 oz 90.7G they dont say how much the muffler is for the 52 .