Here are some pictures of a spitfire I built a year or two ago. I downloaded some plans from the internet and resized them to the size I wanted to build. I bought some small balsa sheets and then cut out the wing ribs and formers for the fuselage, then used balsa strips to link them. This is still lying in a box somewhere, I can't finish and cover it yet because i still need to get some electric innards so that I can make it into a micro RC aeroplane.
I have now attached the plan I used, just click on the image and find the correct resolution or crop the picture into 2 halves on a Microsoft Office document so you can print it.