Portlines can supply the cardboard "horn" and needles that will produce different volumes if memory serves me correctly. The horn may actually increase the volume by itself. It is advisable to change needles every so often as not doing so can eventually damage the record. The cam needs only some light grease on the lobes and a dab of light oil on its shaft. The cam can be adjusted with some patience to restart the locomotive at the proper time (when the whistle sounds on the recording) if it is starting too soon or too late.
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