has posted up an interview with Binaltech Designer Hironori Kobayashi. This includes some pictures in the sidebar, with some blueprints of Smokescreen/Silverstreak! In the interview, Mr. Kobayashi speaks about the difficulty of gaining copyright access with the car companies, the intricacies involved in making a Transformer figure, and more! The English version of this fascinating interview can be found here.
If you prefer to read it in the original Japanese, you can find that here.