How wide are the bottom holes on the television from its bottom edge? That's what I want to know, so that I can work out in advance in advance, where I want the drill holes in the wall! I don't want to mount the TV with the supplied original wall bracket supplied with it, but with the ERARD EXO 600 TW 3 wall bracket. I assume that the original wall bracket must first be dismantled. What is the usable Vesa hole spacing for this television? 300 x 300? On the picture of the back of the television you can't tell. The holes for the original mount seem to be much too narrow for the Vesa standard?