I don't think detail is needed when the overall purpose is to cart around carbonite blocks, right? I mean, you don't want people looking… although the front part (that swings open) doesn't need to be that long. 5/5 for great concept though!! :)
I really like the overall idea. How it opens up to squeeze in a carbonite Han is neat, but the rest of the craft is plain. Perhaps make the craft less rectangular, and add more details, such as vents, a windshield, etc.