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<p>For anyone who is interested, the ID of area in the smokebox is 0.78".  The depth is approximately 0.87".  This gives an approximate volume of .42 cu in.  A cylinder of lead approximately that size will yield a ~2.7oz increase in weight.  Copper 2.1oz, Brass 2oz.  Note there are wires running through the smoke box, space needs to be left for them.  I plan to add a piece of scrap brass that I have acquired (weight .5oz) wrapped in black electrical tape and will report results after layout is again operational.</p>
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