While I’ve got some interest, I’ve got another Q.
My 8/1 came with an original (I think) cast iron exhaust damper. The fume goes in the top and then exits from one end of the cylinder. The opposing end could be used but is fitted with a blank.
My Q is this, is anything supposed to be inside the damper? Mine looks as if it may have had another skin inside but it could just be iron residue from containing water for many years.