Mysticeyes, I have just gotten boundary layer mounts (BLMs) for my 4060s and have not yet put them to use, but I still have the instruction card in front of me. According to DPA, "The smoothest frequency response is achieved with the diaphragm perpendicular to the reflecting boundary." In addition, they state: "Please note: The microphones must be mounted with the short grid (soft boost grid). The long grid will not fit in the disc" [boldface original]. Finally, they caution: "When you mount the microphone in the BLM, be sure that the mesh is completely covered, so there are no openings, as they will affect the sound." While they state these directions in rather stark terms, the only consequence they name for not following them is "coloration." Because Gutbucket is such an accomplished recordist, it would be the height of arrogance for me to second guess his technique. Besides, the greatest esthetic pleasure for the engineers at DPA may come from looking at frequency response graphs and I think Gutbucket is more concerned with musicality. That said, since I had the manufacturer's instructions at hand, I thought I would pass on the information along with encouragement to experiment: the "coloration" that might mar the beauty of a graph could improve your recordings of particular sounds in particular spaces. Enjoy your 4061s!