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Fibre Optics: I use a lighter to heat the tip. It will form a convex "lense". I use .040" and .060". I pick the size that is slightly smaller than the opening and heat the fibre optic with the lighter until it is of diameter to seat in the opening. The soldering iron should work also. <br />1k (1,000-ohm) resistors: I read an article from Railroad Model Craftsman (sorry MR) "Demistifying DCC, Part 8". It covered how to use and care for LED's and bulbs. Works perfect with no problems. I have not lost an LED yet! <br />Jameco: The more you order, the cheaper it is. 1 led is 2.95 ea, 10 leds are 2.65 ea...shipping is reasonable. You can pick which method you want: FedEx, USPS, UPS, air, ground....I pick the cheapest. <br />I also use heat shrink to keep LED light out of the cab.
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