I may have figured out the joining of the front engine to the loco. My guess will be, once I find the tiny screw to go with the feeder screw, will be to connect the horizontal bar screw last. The whole thing "should" hook together nicely once I hook in the bar screw to finish it off. At least now I know WHAT the original problem was, WHY I couldn't find it, and HOW to get it back on the track. Does anyone have a clue as to what screw I might be searching for. It's extremely tiny and threads into another tiny threaded screw? HOseeker's Instruction sheets just don't show this piece. Hopefully someone's seen something similar in their years of making these trains sing like canaries. I'll be off to search myself. Thanks as always for the help!