Function missing

If I mix GASD to GASD with a V curve (as I need with neutral at half stick position), so I cannot use GASD for inverter.
As I use steering-GAS mix I cant use stick position for inverter.

For inverter I need a linear initial curve for GAS, which is stick position.
Where can I find it for mixing steering to GAS, otherwise than creating a function ?
Problem is very easy to solve with electric motor, but inverter for gas engine is not usual !

If you create a 2 engines model, gas is P2, giving Gas 1 and Gas 2 as servo outputs.
And you cant mix Gas 1 and Gas 2 with anything because they are not functions.

Looking like no solution except taking one function to give stick position.

Is it so difficult for Jeti to put a few more functions in their program ?

January 25, function still missing on DS16 !
Waiting for next soft...