hi guys im new to this helicopter thing.i just bought a blade 400 with kds flymentor.the guy who sold it to me fit the flymentor for me.but when i start the heli it goes round and rount.when i try to turn right it it turn right and goes round and round to the right side clock wise.the tail blade never comes to the nutral position unless i moved the joyistic bit by bit.isn't it ment to come to the nutral position when i let go the joystic.anyway i managed hover it and crash the the tail boom and bend the Flybar. if anyone can help me to solve this proplem that would be g8.plus my tail servo's always adjesting it self i don't know whether it has to do somthing with the flymentor or not.tail servo never stays 90 degrees angel.one more thing guys i need to repair my heli copter now if any one can tell me what tools do i need (names of the tools.brand of the tools and size of the tools)to repair blade 400.plus what parts do you think i should replace along with the flybar and Tail Boom.