Shock Arrow Timing Window?

To make my StepMania 5 simulation of DDR more accurate, I'd like to make Shock Arrows trigger in the same instance that it would in arcade DDR games. I've tried increasing the TimingWindowSecondsMine string in the Preferences.ini as far as 9.999999 to see if it makes a difference at all, but they seem to work the same way regardless of what I set it to. They'll trigger the same instance they reach the stepzone. I've never played a Shock Arrow stepchart in a true DDR game before, but from what I can see the timing window for them is much wider than that of the mines in StepMania/in the groove. How could I simulate such timing window in StepMania 5 for a more accurate feel?