If you could build only one kit

Only one kit!!
Well if I must. I would have to go for the Lancaster and all it's variants. Back date to a Manchester the foreward to a Dambuster, then a Tallboy and Grandslam variants. For a second helping a Bristol engined model. For desert a Lancastrian and a York. Now I will push the envelope with variations....The Lincoln, long and shortnosed modelsand as a finale the Shackeltons. These last two are still variations and enlargements of the basic Roy Chadwick design.
Dai.

1/72nd scale hienkel he 162!!

If I could only have one KIT and not all the different variants in different kit form it would have to be the Eduard P-39. All the parts you need are in the box to build everything from a P-400 to a P-39Q.

any combination of scales of the A-10. Thats the baddest plane ever produced!

I'll build Tamiya 1/16 RC Tiger. It's probably the most expensive kit...at least for my knowledge.