Thanks for responding Wayne, Ya I intend to do it on the spot with a mixer, thats why Im kind of nervious. I want to try it because Im going to be at a nice sounding outdoor venue with a HUGE crowd, so I think it will be nice to get some "room" with the omni, also I think it will help give me nicer bass.
The venue is a huge concert field w/ a permanate stage owned by the county that they host free concerts at every sunday night in the summer. The crowds are always GIGANTIC, DTB had probably 10,000+ easyly, Blues traveler 15,000+. Last time I taped there I ran din, but you couldn't hear the roar of this giaganitc crowd, so I think havin that omni would help pick that up. I just wanted to see if anybody more experenced had any general tips. I just wanted to know if putting too much omni will diminish the stereo, If it is not uncommon to have as much omni as cards, ect... stuff like that.