Looking to wall mount a 27" iMac. Does anyone have it mounted on the wall or a clamp post who can give me the depth of the iMac (thickness) from the face of the screen to the back of Apple's VESA adapter. Then I can figure out if my mount that I want is 3.75" or 5.3" or whatever and what my total depth from the wall will be. Apple's specs only include the stand. I don't want to get the VESA and a mount and find out the face of the screen is 13" from the wall with it pushed "flush" and not even extended. Thanks.