I already have two SB800's but am thinking of adding two more. I was thinking of a setup like this 1) one - Camera Mounted 2) one - Behind the subject 3) One each on the left and right of the camera on stands/tripods, whatever I can manage. My question is that generally the ones in 3 as above should be bounced off a reflector or a hood/umbrella? I have seen these small white hoods which fit onto the SB800 head, in the Nikon DVD , but am not sure what these are called and which ones to buy. Anyone using them can please suggest which ones to buy ? Also would appreciate all other suggestions.