Overdrive tilt sensitivity on X-plorer x360 wired

[frxxzz]

Overdrive with the tilt option launches with any slight movement of the guitar, so it's impossible to accumulate star power. Usually it launches right after you gain the star power. Is there any way to increase the deadzone? Or maybe remap it to the whammy, because using the select button is even worse, it's too small and I can't press it without taking my hand of the strum, which makes me lose the momentum