On a jacket like the ANJ4, some makers use one panel for the back (LW) others (like AERO) use 2. I also notice that on many of the photos where people are wearing the jackets, there is a sort of bunching up and sticking out/up/bulging from excess material on the back around the arm pits. Trying to find an example now, spurr of the moment, is difficult but this is one here (hope the owner, whoever it is doesn't mind- this was from a google search) Wondering is two panels may lessen this since there may be more flex/tighter fit because of the centre stitch. What do you think? Also, I know its not the style/designed fit of these jackets (most notably the b3 for example) but who would you say makes the least loose/closer fitting (given "correct" sizing) of the ANJ4s?