[quote author=Steve Deckert  link=1154300940/30#41 date=1154473484]I just looked at the prints and I'll be damn, the width measurement is gone!  It is 12.5 inches btw.  I'll update the print soon.

Steve [/quote]

Rear panel width 4.3 + 4.3 + 3.75 = 12.35 < 12.5.   ???   "B" braces could have a slight gap with wider panel.  Not that I think it really matters.  I used 12.35 in width on my template and the "B" braces were flush at the back and along the sides.  YMMV.  I am considering applying a cloth cover (grill) between PL2 and PL3 panels so I would want the "B" brace slightly indented anyway to fit a cloth grill flush on the outside.  I have not decided how to do this mod yet so I am kind of stuck at this point.  I also am wary of any obstruction the cloth grill could have to air flow.