BF109 - Can't we just have the gunsight in the middle?

[b101uk]

Well all that need to be established is the width of the reflector glass (thus its centre) (which is suspect is wider than >3” (>75mm) ) and the aperture thus FOV of the rectical which will denote if a pilot could use his brain to merge the 2 images (left eye cannot see the rectical when the right can) or if he was required to lean a little &/or close one eye etc.