I have a couple of projects going on that require a lot of 5 rail track, O & Standard Gauge. I decided I needed a tool to crimp the ties to the rails. I used a 1/2" bolt and cut a groove on the end deep enough and wide enough to clear the rail. I also ground away material on the outer edges leaving a protrusion in the center to help the crimp hold better. My buddy Bill and I did 12 pieces of 36" straights the other day and the tool does a much nicer job than my prior attempt. I put a piece of hard wood under the tie to act as a buck before striking the bolt. The piece of wood was ground so the width slips up into the bottom of the tie.
The tool would look a lot more "professional" if I used a piece of rod instead of a bolt, but the bolt was handy.
Steve