Mina, the only obsticle that really gets on my nerves is the ground.. . There are a few tools that would come in handy for keeping your helicopter tuned to perfection. 1) a micro heli pitch guage so you can verify that you are maintaining the optimum pitch for the range of throw on the rotor head. 2)Dubro High Point Balancer to check blade balance and flybar balance with the head assembled out of the heli. 3)An accurate digital scale for weighing the blades individually, and there are specific blade balancing tools out there that can take the place of the scale. These things are not dire necessities mind you but take alot of the guesswork out of keeping it all in check.