Which coil do you use the most, the standard 8.5"x11" coil or the 5"x8" and why do prefer one over the other? Also, what is the weight difference? I can't seem to find that information. I did notice that the specs on the At Pro and the At Gold give each a weight of 3.03lb. I like using the standard DD coil on the At Pro but was thinking about getting the 5x8 mostly for the weight difference, if there is enough difference to notice.