I created this after I watched the film. The film is wicked!! I love it. At first I made Optimus Prime but broke him up 2 make bumble-bee. I first had 2 make him as a robot then broke him up and made the car,while trying 2 remember how 2 build him as the robot. The car is't very good and doesn't look like the it, but it's quite hard making a fully transformable transformer. Hope you like it!!
It is not realizable although I also thought several times.
I consider it better to carry out transformer form as your proposal, after making the form of a car.
PS:Thank you for the review to me.
I am not good at English.