Hi Bon_Scott, Mod BB and members
I hope you sort this - to help others.

There is sure a BIG difference between a 'Hush-Tone' baffled muffler
and one where the baffle has rusted away.

Quote
left. I imagine it to be 2 separate chambers so the gases are trapped in the first chamber then goes through the screens to muffle the sound then exit the screen via the second chamber
I wish I understood muffler theory. What you say is how I imagine it.
That's a great job on that inner first baffle.

Many thanks for the updates.

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Jack