Adjustable launch button

I switched from foot braking off the two-step to using the front and rear line-lock wired to a button on my shifter which also goes to the two-step. I have the rpm set at 2500, hold the brake, set the line locks, let off the brake and on the last yellow I let go of the button. Right now if I leave when the last yellow comes on I'm about .010 red. I want to be in the .020 green side of things.

PM sent swifter.