Change increment for fader nudge?

I am using the Pro Tools Scroll Faders package to nudge faders up and down with the up and down arrow keys. By default it seems to nudge in 0.5dB increments, which is nice, but I would also like the ability to use another trigger to change the increment to 1dB, for example. How can I change this increment in the code? Here is the code for reference:

var win = sf.ui.proTools.floatingWindows.allItems.filter(function (w) {
    return w.children.whoseTitle.is('Volume').exists;
})[0];
if (!win) {
    //No window to redirect to. Pass the scroll even on
    sf.mouse.scroll({ delta: 1, unit: 'Line', isControl: true });
    return;
}

var fader = win.children.whoseTitle.is('Volume').first;
fader.elementClick({ actionName: 'AXIncrement' });

Thanks!