Peter:
Have some confidence...you can always buy new parts and we'll help you put it together.
For your entertainment, here's a true Can't-Put-It-Back-Together story:
When I was very young (a few years ago) I had a Mickey Mouse watch (original from about the 1940's). The watch stopped...being a bit curious (and stupid), I took the watch apart...pieces came flying out all over the place. I carefully put everything into an envelope and asked my 14 year old cousin to "fix it". He looked at me like I was crazy.
I threw the watch away. DUMB!
Moral of the story for Peter: You can always throw the car away. (Just kidding.)
Hope this makes you feel better.
Richard M
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