outdoors, i really like ortf....but indoors, it just gets too boomy, so i have been using 90d for up close and "pointed" farther back, however, nutter technique sounds better than pointed, yet, my distance is closer than 6-8in, i use the stereo bar and adjust the angle and point outside the stacks, imagine pointing at the space of air about 10ft from the stack, thats where i am sometimes, just gotta base it on the size of the room and the sound of the room, and where i set up. it is part science, part technique, and part crapshoot sometimes. heh