Well if people are using custom 3d printed detents, they could have a different position compared to you, so their setting might not work either.
I think it’s a good idea to tackle this problem with logical steps. Here’s what we know.
On the default detents, we know that Thrustmaster throttle quadrant is set up to have equal spacing between each detents. About 25% power increase for each detents since we have a total of 5 detents and 4 gaps in between that’s equally spaced.
The throttle in the default A320neo are not equally spaced. we have -20% to 0% for the reverse to IDLE, then 80% from IDLE to CLB, then 15% from CLB to FLX/MCT then 5% from FLX/MCT to TO/GA.
These differences in detent spacing is the reason why the default profile has an increase in sensitivity on the first part before it drops once it reaches the 80% mark. This is to cover that 25% movement in the physical throttle to cover 80% of the virtual throttle in the sim.
So, coming back to your custom 3d printed detents. Where do you place them in the first place? All you need is to compare the range that your physical throttle must travel for each detent, then matching it with the virtual throttle that it must travel to cover the same range. The closer they are together, the more linear you need the sensitivity to be.
Let’s start with the IDLE detent. You can use the “Neutral” slider, to find the IDLE point. Position your physical throttle to your IDLE position, then check the virtual throttle position in the cockpit. If the virtual throttle is higher than IDLE, then your neutral point is too high. Gradually reduce the Neutral slider and keep testing until you have a matching IDLE point between your physical throttle and virtual throttle. Similarly, if the virtual throttle is in the reverse zone, then you need to adjust the neutral point to a higher value until you do.
Once you find the Neutral Point to match the IDLE position, you can look for the other detents, starting with the CLB. Same method. position your physical throttle in your custom CLB detent position. then look in the cockpit. If the cockpit position is higher than the CLB detent in there, your sensitivity is too high. adjust the slider to reduce it. Same thing if it sits below the CLB detent in the cockpit, increase the sensitivity until you get it. (I can’t remember from the top of my head which sensitivity slider to adjust for the forward thrust.It’s one or the other, so just try them out.)
Once you get the CLB detent matching, the rest should match as well. Otherwise, you can do minor adjustment with the sensitivity without unmatching the CLB detent, or you might need to move your custom 3d printed detents around as well until you get a matching one.