How to lower the Voltage Proportional to X axis on the right ps4 analog stick?

Hello you all.

I want to make smaller micro moments horizontally using the PlayStation controller.

I know of devices that can adjust and mod the controller through a micro controller connected via a USB hub, but I want to literally open the controller and on it's pcb adjust the analog stick x axis input to it's stock on board micro-controller for that specific analog stick and in a sense re-interface the controller and lower the Voltage Proportional to X so when I move from right to left or vice versa that axis doesn't send a signal to the onboard stock micro controller to move as much.

How would you all recommend going about achieving this task?

( I have linked a picture of the inside of another controller I took apart. The internal diagram of a PS4's Joystick Module and it's tiny Micro-controllers.)