RE: HOW-To..3D maneuvers
1st point being is a slightly and I mean ever so slightly nose heavy plane 3D's much better than a plane that is too tail heavy.
2nd point is its easier to learn to hover/torque roll a plane that is slightly nose heavy than a plane that is too tail heavy.
3rd point The main mistake 3D newbies make is to go tooooo tail heavy which also presents problems when landing.
Beyond these 3points CG is adjusted based on pilot preference, comfort and setup.
once again just my experience
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Your as right as one could be . I practice 3D on a ChargerRC foammy . I can hover all day . When I fly it inverted it takes 1/4 down elevator to fly level . It torque rolls much easier this way . I also have an Extreme Flight Yak54e and set it up barely tail heavy . It flew like Crap and landing was difficult . I started putting the lipo further forward , through the cockpit firewall to get just ever slightly nose heavy and what a big difference .