I'm running an EoTech mounted directly on my flat top along with a LaRue BUIS.  Cowitness is perfect and with the fixed BUIS being right in line, the presence of the BUIS doesn't bother me.  Now I'm thinking about adding a LaRue mount.  My question is, with the EoTech raised so the irons are in the lower third, does the top of the fixed BUIS' aperture get in the way?  Is the visual screwed up?

Nope

Thanks.