[Bruce gets the sense that Jim's "nothing fancy" is not like his definition. Really, he sees the use for a shuttle, and he could probably find a solution to the propulsion problem if he worked on it long enough. Or...]

I could give it a shot, but I'd-- honestly, you should talk to Tony. This is what he does. What'd take me a week on this, he could do in a day.

Here. [ICly forwarded link!]