I need to paint my exterior mirrors a different color. I can't figure out how to remove all the mechanism from the mirror housing. I've removed the exterior screws. The 2 from the bottom and the 3 from the motor. When I put the mirror in a tilt up position there is a screw that secures the mechanism to the housing and I removed it. The mechanism still won't come out. I suspect there's still one more screw that's hidden behind the mirror glass. Am I on the right track? What am I doing wrong? How do you remove the mirror glass? Thanks for any help.