Action Camera Helmet Mount Customizable

I need some help with this one. I have designed this GoPro/Action cam helmet chin mount based on akun2500's design. However I am having problems getting the mirror to create a solid object. I am hoping someone better in SCAD then I am (not a tall challenge) can get the model to work as one piece. Also i want to have the holes incorporated into the design. You can see where I commented out that part of the model. The camera mount is not my design and I couldn't get the Camera mount to print stron