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The main concern I had with the track was the integrity of the plastic "rail spikes" on the ties. They are the flimsiest part of the track, and I figured the only part that would likely see any problem. UV will eventually cause the plastic to harden and become brittle. It's not a matter of if, but when. UV radiation will split any long-chain molecule (plastic polymer), which will reduce the overall strength and flexibility. If the track is laid fairly stress-free, then that should contribute to longer life. Some plastics are more inherintly UV resistant than others. Nylon and other similar plastics are better than standard PVC in that regard. I've seen battles with various plastics for years in the electric utility business. Ugly business. Mark in Utah
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