I also read an article that suggested the nose weight be set up on a track that is controlled by the throttle servo to allow a variable CG movement for a trim or "throttle" control. The advantage being that you can maintain the airfoil shape during slow flight rather than increase the reflex and even further reduce the useful lift coefficient range over what most reflexed airfoils already have.
Ideally if you don't take this TOO far you can pull the CG back and add DOWN trim to prevent a stall and actually increase the airfoil's camber and gain a little extra useable lift coefficient for slow flight. Obviously if this goes a little too far you'll end up with an unstable model. But it's the sort of trick that would be fun to try on a quicky build hack ship..... and about 4 mistakes high....
