Thanks for the replies. I ran a magnet around where I could...some places are unreachable.

 I was operating my K-4 on the club layout and after a little while discovered the the pilot truck screw had fallen out. Our layout is rather large and after an hour of searching I could not find the hardware (screw, spring, and flat washer). Can you tell me where to find replacements? I went threw the Bachmann parts/service web pages and there is no part listing for these items anywhere.
                                                  Thanks Karl