Herelink rc setting

I want to set up HERELINK using PX4.
The RC used previously used MODE2, and there is no return spring on the throttle.
However, the HERELINK only has a spring in the throttle, which is very dangerous in Stabilizer mode.

Is there a way to solve this?
Help me.

Typically you need to take the back off and back out some screws to remove the detent/friction and disable the spring.
However this may not be an option: