i took apart the back of my handles abit b4 i painted them. mainly the black plastic gasket and to take the button off. ill give warning to anyone... everyone of those lil screws contain a hefty amount of locktite.
of the 6 screws that i took off... 4 of them got completly stripped, one of them i couldn't even get off.. i ended up twisting the plate that holds the button down off and ripping the screw out (apoxy was need'd to fix it back in). went to the home depot and bought new screws. there metric size
m4 machine screws for anyone who has done something similar and needs them replaced.