Alright, I'm home and where was I? O-yeah, clean off the bench, then bust out the plans. I gotta say, I know it suxs but you can only go so far building the fuslage without having the wing and tail feathers done, IE can't lineup the wing bolt plate or pin plate, bottom plate and you can't do some shaping to the tail blocks without the tailfeathers sitting in there to give you a reference. I have built many in jump around order, but sometimes you find yourself painting yourself into a corner and you'll have to wait till something else is done. Did you have your heart stuck on starting on the fuse first?
And there was a question about a GP extra cowl fitting a SSE, no, it won't fit, way too big, width,and height, I've seen a SSE nose, just a little bigger than the .40 that resides inside it, the GP extra cowl will eat up a .40 on it's side without anything sticking out. Maybe a H9 extra 260 in the 480 sized ships would be closer to the square box of the SSE.
Anywho, off to the dungeon to clean off the bench, BTW, what's your building board, I use a solid 3/4 MDF (brown hard partical board) with a ceiling tile bonded to the top 2x4 variety. one 2 x4 setup weighs in at 30 lbs, just to give you an idea of how thick and heavy the board is, which equals stiff and flat, just the way they are pressed from manufacture.