Berz: As far as imaging goes placing the tweets as close to the mids as possible may help imaging but at that point you typically will lose stage height. As oppose to what I have done which is place them in the sail panels reflecting off the glass with a -3db attenuation gives you a phantom center channel, and proper left and right staging, along with an appropriate stage height. it took a few dozen hours of tweaking but was well worth it in the end.