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Thanks for the info. Have found some info and mostly relates to engines running without other cars or caboose. I have decided to use red and green led's with fiber optics running to the housings. <br /> <br />As a side note: I have found that after running the fiber optics thru the hole, and then heating them (very carefully) with the tip of a soldering iron to "mushroom" the end makes an excellent lens appearance when they are pushed back into the housing.. <br />
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