What you see is how they work. I make the Skylab Fusion digital torque split controllers in the UK.
All these units so is tweek the voltage coming out of the G Sensor. Well, thats a simplified version.
What you see on the screen related directly to the voltage output from the G sensor. When the dot is in the middle, the G sensor is outputting 2.5 volts. 1.2G is 0.5 or 4.5v depending on direction. The usual ratio is linear. What my controller does , and all the others is alter the relationship between actual G and what the ATTESA sees.
This is why you cannot use them accurately with the R34 Display.