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Reply to "Are you guys soldering Atlas 3-rail track, also, rail joiners, too?"

@ScoutingDad posted:

Good question on cleaning the inside of the joiners especially the blackened ones. Maybe it does not matter as long as there is a solder connection between the rails

If you've actually jumpered the joint with a physical soldered wire, the rail joiner is just a structural member to keep the rails aligned.  Clearly it wouldn't have any measurable effect to clean it.

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