I second what the stump-man said.

If you are looking for improved control, maneuverability and reduced blade clack without adding weight I would do the following:

1. Soloboss flybar modification.- This will enhance directional control by reducing the heli's tendancy to fight control input and returning to level hover. It will also decrease the likelyhood of blade clack.

2. Level the swashplate so that the heli hovers with the elevator and aileron trims set at center. Make sure the servo arms are horizontal and at a 90 degree angle with the pushrod linkage.- This will ensure the full range of motion of the servo arms is transferred to the swashplate and blades.

3. Get a carbon fiber tailboom (I like Boomtown Hobbies [link=http://shop.boomtownhobbies.com/product.sc?categoryId=9&productId=1]Here[/link])- This will reduce weight and the effects of wind, ground effect and rotor wash.