You are running the 4th hole and not clacking blades? You must have a really gentle touch. I think you'll find that the 3rd location for the servo link works fine when you get the flybar to work WITH you. When it stops fighting, you need less input to get the performance you want. With the 4th hole and the extreme light-bar you might expect to have control issues. You will have 4 blades all working together and you have just 8 oz of helicopter.
These things can get really nuts and if you are good enough, they're pretty amazing. Keep up posted!