Wheel accel/brake help needed (default 100%)

[votanxerxes]

Am trying to get my Thrustmaster F430 wireless cockpit running (PC to Xbox one translation) via the Controller remapper I'd downloaded from the online resources. All works fine, except for the throttle and brake pedals.
Both potis deliver 100% when untouched.... and go down to 0% when fully pressed, what makes a game think, throttle and brake are fully pressed while they are not.
So I guess, I need to find a way to invert these two values (input right stick/left strick), so that when on 100%, the titan two actually sends 0% and accordingly inverted values for all the 0-100 inbetweens.

Any help would be very appreciated.