one other thing.check the mail wheels tomake sure they spin freely and that they are toed in a bit,toe in is when the axles are bent so that the wheels point towards the nose gear.this will help keep the plane running in a straight line once the nose gear comes off the ground.also the length of the nose gear strut length should be adjusted so that the plane is sitting level or a tad nose up.worst thing is to have the nose pointing down,takes too long to rotate.