Thanks for the clarification Don. It's pretty interesting, I never really thought of the things I build as belonging to someone. They were always just some random machine. It's good to see it in a different way.
Thanks for the luck guys.
My progress:
Somehow I got most of the fuselage done, though not all glued together yet.
My suspicion paid off, and most of the formers are too small just like before.
I have a new system for dealing with them now:
a) Cut out the adjacent skins accurately, and the formers oversized
b) Trim and/or sand down the formers to
almost fit the skins, leaving it a bit large, trying to fit them both decently
c) Once I find a compromise, I sand them both at once, making them match and also small enough to be just right for both skins.
e) Now that the formers actually fit, I can follow Mr Wasiak's instructions - glue both formers simultaneously. Starting with the marked middle point of symmetry, I glue a quarter of one, then the other, and so on, until I just have a flap left.
e) Now I carefully take the flap to meet, and mark the point of overlap if the formers came out too small. That was part of the compromise between adjacent skins. I trim that off, and hopefully it ends up matching.
f) Finally you sand the faces of both sides to make it as flat as possible.
I know others do it differently, and it isn't perfect. It's working pretty well though.
Here are a few segments just stacked, without glue. [note the bottom segment isn't supposed to match, it's an under detailed part of the cowl]
The design calls for making the segment and then cutting out holes for things like the cockpit. I tried it, and it was pretty iffy. With a fresh blade it cut alright, but I still got some shredded edges.
Not only that, but it's hard to actually fit things in. I resorted to needle nose pliers through the open circles in the formers... if you want to do it this way you might want to cut them larger for even more control.
Here's the very basic cockpit. There's nothing planned to seal the giant gaping hole into the fuselage at the gunner's feet, I could've done something but didn't really plan ahead. It was awkward enough without extra things blocking access.
You can see that one segment didn't line up, but besides that the skins fit together pretty well. I have all the segments right up to the tail, and none have significant misalignment.