This pictures are taken on the mini titan, please note that the tail blade is the thing to look
at, the pitch slider's position may be different for other helis.
If the tail blades actions you see on your heli is opposite, REVERSE the TAIL channel.
In neutral state, the tail blades will have a bit of an angle, eg 10 degrees
In order to get the neutral state tail blades angle more or less in the ballpark, adjust by
sliding the tail boom servo mount forward or aft. Alternatively, you can also adjust the
pushrod ball links.(for frame mounted tail servo, this is the only option)