Have a customer that would like me to mount a shower head on a glass wall. The valve is on the back wall and he will have a half wall of glass on the side. His goal is to have the shower head on the glass so it looks like the water is flowing out of the glass. I ran the water from the valve over head and hung a wing ell close to the wall. The only thing I can think to do is come down with a long straight shower arm and put an elbow on it for the shower head to screw into. Any advice on how to secure the head better and make it look like it comes out o the glass?