UNPLUG any two motor wire`s, and make sure you have NO sub-trim or trim set in the radio.
with the pitch curve set to 0,25,50,75,100 in stunt and normal, run the throttle up half way.
now look at the servo arm`s/horn`s, they should be sticking striaght forward (towards the front of the heli) i`m talking about the two stack together.(pitch & alerion) the elevator servo (the one under the battery) the horn/arm should be some what striaght across the servo.
but more importantly, the slave arm behind the motor should be sticking strieght forward (toward`s the front of the heli)
now with the servo arm`s at 90, check that the swashplate is level and at the MANUAL`S recommended hiegth.
after swash is level, move to the washout arm`s, they should be level as well.
then move to main blade`s and make sure you have (0) pitch at half throttle.
as far as the tail problem.
make sure you have NO slop in the grip`s and pitch slider. any slop in this area on the blade400 will cause many of unwanted problem`s.
crash`s come easy patience`s doesnt