I've just aquired a 4X5 reducing back for my 8X10 camera, and am excitied about the possibilities this represents. I want to ask others who have used a reducing back about the experience they have had, and how it has affected their working habits in the field. Specifically, to what extent has the back eliminated your need for a 4X5 camera? Do you photograph multiple formats during the same outing in this way? I have in mind that I will shoot 4X5s much of the time, and save the 8X10s for spectacular lighting conditions or I when I find a subject that I really like, and want to make a very large print from. I am also planning on using the setup to shoot 4X10s using the half darkslide method. Since I don't often use any very wide lenses, the longer minimum belows of the 8X10 won't be as much of a problem. Is using a multiformat setup like this a good way to get more out of a photographic session, or is it just adding complication to the photographic process?