Thanks Mark. I used 6 strand metallic embroidery floss. On the bottom of the bridge roadway I drilled 1/4x1/4 counter sinks and then cut a channel between them all with a dremel. The floss was just over 8 yards, so it was just enough for one side. After feeding it thru all the holes we double knotted the beginning and then filled the counter sink with hot glue. After it was stretched taught the last hole was filled with hot glue and then the tail was laid in the groove and hot glued again.
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