While Fastcargo has some things right, he's totally missing that when unwrapping, you want to keep any texture seams to a minimum - this usually means confining them to the least visible places:
Notice here how with the sole exception of the top faces of the fuselage, all "seams" have been confined to 90dgr edges or parts that are not likely to be seen; ie inward-turned faces. Therefore, like a lot of other 3rd party maps here, Fastcargos technique gives him one set of completely unnecessary seams simply because he didn't bother connecting the sides to the top and only keeping the seam to the sharp corner on the bottom where it belongs. Not saying this is always possible, but it is easier with some shapes than others, especially boxy ones like modern fighters.