your servo arms need to be paralell to the ground... if your arms aren't even, they are going to mess with you when it comes to mixing, it'll bind things up (that's as technical as I can get)
when adjusted properly, this will put your swashplate paralell to the ground and arms also...
you need to make adjustments to the heli with the power of the radio on and the helicopter plugged into the battery.. (pretty obvious, but guess who forgets this part

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