Toshi, I like the level of pre-shading you got going. Not saying it is the correct way, but for me, it's just enough to see that it's there, without being over powering.
Scott, coming along nicely. It appears you have things well under control. What I might of tried for a better fit of the interior pieces is sanding the inside (or maybe you did this too?). Even some carving where the bulkheads are could be an option, as the fuselage pieces looks to be fairly thick.
regards,
Jack