Only minor modifications required to the plastic slope under the coal tender to fit a really good sound to the O4...
Here's another example, almost exactly the same, but with some additional holes drilled through for the sound to escape from.
Photos provided courtesy of Mark Larder and Stephen Payne
Disclaimer
Please note that these guides are provided as useful resources for you, as-is. YouChoos cannot be held responsible for
errors in the information, or for any damage caused to your models or equipment if you choose to follow any of the
steps detailed here.
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