I just love this whole reverse engineer alien tech thing. A simple bit of thought would prove just how silly it is.
Take a piece of mundane 21st century technology, like a cell phone. Send it back 100 years to the very early 20th century. Now figure the odds of those folks trying to reverse engineer it and tell me we can do it for tech that is likely 1000's of years ahead of us.
To reverse engineer it, you would likely first have to have some vague notion of what it did and how it did it. cell phone sent back a hundred years - even a simple one that was really just a telephone - would be hopeless. MAYBE if you sent it back to the mid-60s they would have a good chance, but.