Any way to modify the range-of-motion on sticks?

I have a strange problem. Bought a Moto Mod gamepad, works fine for most things, but certain games don't read a full forward tilt on the left stick correctly. Did some investigating and it looks like my controller is only hitting 85% or so of maximum in that direction, vs 100% in the others. This being android, I don't have many options to correct that.
Is there any way to change the axis ranges in ePSXe to match my controller input? Right now in any game that uses up/forward to run, I only...

Any way to modify the range-of-motion on sticks?