Interesting to note that others have had fit issues with the lower wing. My problems were of my own manufacture and I hope to avoid repeating them as I have a WnW Camel, Dolphin, DH.2 and Biff all with similar interior fuselage structure.
The reason it stalled is that it is a WnW kit, my first one, and I was unprepared for the overall level of detail and need to think ahead, yet follow the instructions precisely. I hadn't started a WWI plastic model in over 10 years when I started this one. I was mainly building it to see what the interior structure of a Pup was like for when I get around to building the 1/3 scale Pup I have in my RC stash. WnW was definitely more than I bargained on and it threw me for a 10 yd loss.
I learned a lot on this build. The need to prime in a color appropriate to the final finish, never pick up a drill without using a scriber to make a starter hole. I also learned great attention needs to be paid when installing rigging eyelets in order to leave the open loop oriented so the line can be easily aimed and passed through, (took me 3 hours to rig the U/C). I suppose the most important lesson about WnW kits is that they are an order or more of magnitude more precisely engineered and dry fitting is not the exercise in frustration and futility it is in many less well engineered kits out there.
So it's time to go flog these tired old eyes and stiff fingers into threading rigging line that I can barely see.
sp