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For non-DCC the all-live frog selective power routing feature is nice for yard ladders, but if only the points are used for power routing they need to be cleaned periodically. To avoid this maintenance nightmare auxiliary contacts are often mechanically linked to the throwbar, either in the remote controlled switch machine or added alongside or under the table, or may be embedded in the ground throw if used. <br /> <br />Where space is tight (crammed yard, N scale) and remote machines/control panel or operating ground throws just won't fit, I wonder how many of us use the finger-on-the-points method and can't be bothered with the mechanical hassles of installing auxiliary contacts? <br /> <br />I think I got all possible combinations listed. Let me know if I missed any.
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