Thanks for the advice, but I know with endpoint on the transmitter it can adjust,
but this is not the idea of a good working Flybarless !
A good working flybarless system, must know by own software the limits, like you adjust the tail !!
Only with this you can take all the potential of a Flybarless system !
Until you make a cosmetical adjust, it will not work as it must !

It's a shame about GT, good and luxurious hardware, but the software is not up to par! It's a Labyrinth, to adjust one thing you have to go to several windows, it's like chaos! But that happens many times with updates, you update but at the same time you don't simplify the software, it's the same when you start putting sticky Memos on the fridge door, in the end you lose visibility!

I am afraid, but I can recommend reading about R/C helicopter mechanics or to draw mechanics at paper.

If mechanics is all correct, then zero degrees between main blades is at position in the middle.
If it is really in the middle, then positive and negative pitch should be exactly equal precisely.

If not, then there is Servo Travel Correction which is exactly for this purpose.

Why we should add another, unnecesary parameter to make setup more complicated and add additional problems for scenarios where people will misuse this parameter?

It is the same using a collective curve or adjust it on the Transmitter or adjust the endpoints ,
all this is the same!

This is correct statement, but this is wrong too if you want to adjust positive and negative pitch to be equal with your radio settings - Pitch Curve.

Only correct way is to set mechanical center precisely in the FBL unit + mechanically. Servo arms should be set to center with Subtrims in the FBL unit while the rest with push rods mechanically.

This is correct statement, but this is wrong too if you want to adjust positive and negative pitch to be equal with your radio settings - Pitch Curve.

Only correct way is to set mechanical center precisely in the FBL unit + mechanically. Servo arms should be set to center with Subtrims in the FBL unit while the rest with push rods mechanically.

if you adjust the correct + pitch, than you have more negative, if you adjust less positive,
you have less negative, inpossible to adjust it mechanicly !

Maybe you are not getting the point why it is done in this way.

ALL other ways to reach equal positive and negative pitch by software are WRONG.
Why? Because the most servos are running at sinusoidal travel, not linear.
In other words servos have servo arms that are moving up and down not stright, but around the circle.

Whatever you will do by software will not FIX sinusoidal mechanical travel.