It is interesting to look at some of the changes which have occurred between the first production runs of Fastrack in 2003 and today. Here are a few that I have observed? Do any of you have other variations you've seen?
In the photo #1, the foreground image shows the first production run of Fastrack. Note the brown ties, and black center rail. The background image is current production.
In photo #2, we see the differences in rail profile. Initially, Fastrack had a rounded tubular profile (right). Later production was switched to a sharp rectangular profile (left)
In photo #3, we see the differences in the base castings. The upper track is from the initial production run. The lower track is current production. Note that current production has: (a) plastic thickness reduced by about 1/3 and is very flexible compared with original track, (b) slots were introduced down center of base to run bus wires, (c) plastic molding was recessed into ties to squeeze out as much plastic savings as possible, (d) rails are not crimped to base as tightly on new production.