Hi Jorgan
The tuning is made on the curve in the TX: There is a possibility to adjust each point separately by 1% at the same time.
The principle of things is : when you open the Throttle, the Valve should open in accordance, compensating for any non linearities. This compensation is very precise and fine.
Now, using the Pots is much too coarse. You cannot appreciate finely by how much you move the points.
Start with a "standard" curve like the one I have given as examples, the start the engine with an electric starter, at about 40% of the carb opening. It will fire and then let it run at this speed for some minutes. Then only move up or down by 1% the points on your curve which corresponds to the opening. Do this watching you RPM either by hearing or with a tachometer.
when you have reached the best RPM for the throttle opening you are using, then open the Thr to the next 10% (next point on the Thr curve) and start again the adjustment.
Don't forget you have 1 curve for throttle and another for Valve.
You define them by 10 ppoints each (this means your curves go from -100 to +100 with steps of 10 at a time).
You smoothen those curves on the TX.
Each engine has it own curve because each engine has a set of defects wich the valve is here to compensate for. I have some curves which are almost flat and some others whith the shape of a hook. Each time the Valve will compensate fine.
1% makes a big difference so using the Pot will never be that precise.