Variable speed X/Y with game controller

When configuring the altmill in gSender, I’ve found that the gantry motion, when using a game pad, is less than ideal.

The movement of the gantry starts out jittery, and then gets smooth after moving an inch or so. It only moves at a fixed speed.

Is there a way to set gantry motion with the game pad so that the speed is proportionate to the position of the joystick?

I have the same issue when I use the joystick. I’ve had some success by adjusting the zero threshold and increasing the movement distance override values under joystick options. It has helped a little but still not 100% smooth