From the moment I saw your first design with the tracks (
#3), I "got it", which is why it's remained ranked in my top 3. Your latest designs all include elements to improve upon this, and convey a sense of a company that is (I hope!) going places.
#3 with that graceful curve shows fluidity in motion. Of all of your designs, I like font used for "Elmira Branch" in
#59 the best, whereas the font you've used in
#55 for "Manufacturing Company" (with the bar and "Custom Scale Models") looks terrific. As for color, the subtle gray tones you've used in all of your designs look the best to my eyes. I do like the "fade" you've used in
#54 and
#58; my concern is I may not be able to reproduce these very well if I were to print them with my old but reliable HP inkjet and still do them justice.