Look at it this way,,it's like a sports a lower the center of gravity,, make the car more agile,, with the copter if the blades are lower in relation to the body,the copter will be more agile,,where the blades are will depend on the flybar,,I like the Raptor 30,,to me it's the best set up out of all the copters i've flown,, shuttle,nexus,xcell60,concept30,