I ran mine just in front of the ejection port on my XCR. I found it was a good field of view and I liked it.
I am also thinking of getting the latest version EO and selling this Aimpoint I got. Or else getting a Micro Aimpoint. I can't stand the 'tube' feeling and the amount of space it seems to absorb and height of the optic above the rifle... I am about to turn back.