I had some issues programming some servos which led me to think my TX neutral points might be a little out.

I reset all TX trims, ATV, mixes etc and measured the pulse coming out of a couple of different RX.

With my TX sticks at neutral, I should see pulse widths of ~1500us.

However, I find my elevator neutral is 1550us and Aileron is 1520us.

As this is consisant and stable I'm assuming my TX pots are ok and that I might just need to calibrate the TX.

I recall from somewhere that a 9Zap reset/calibration process could be initiated by shorting two connections accessible through the battery compartment.

Any ideas where these pins are?