I have two Funtanas. One is 5.75" CG and the other is 6.5" CG. They both do awesome blenders but the one at 6.5 does them tighter and flatter. But I can NOT use full down on the 6.5" CG, it's just too much and screws it up the flat spin. So the rudder and elevator are having more effect on the more AFT CG. It's pretty cool to be able to compare the two CG's on the same model of ARFs.