One of my favorite kits for a quick-build P-39 is from Eduard - the fit is amazing, you can build in a LOT of detail in the cockpit and you don't mess with the engine or nose cannon assembly so it is a very quick build.
I have the old Cutting Edge Air-A-Cutie decal set so am finally putting it to use. Also have a bunch of other old bits, including the Moskit metal exhausts. :-) From 2007 I do believe.
I decided not to got to town on the cockpit, esp the IP, since I am going to use the pilot figure and he really does clog up the cockpit more than a little bit.
Not the best picture, sorry! Will retake and repost, but have already lightened up the face.
I have a few in-process build pics but let me jump ahead a bit...
I've actually closed up and have started to sand the fuselage seams, esp that one on the back. There is a bit of gloss in the cockpit for some decals that I will flatten out. I would weather the seat, and will a bit on the sides, but with the pilot in place, you really on see the one side.
I'll have the right side door open but expect to have the left door closed.
More to come later!