Ok thanks Glenn, so I guess what I am trying to get at, is this something we should be recommending?
I ask because there is an awful lot of info out there, like books, videos and hundreds of forum post that state the opposite to your findings!
Not necessarily in an exact sense but as a general term …. a 8” system requires a 8” chimney.
As a group of enthusiasts I am sure that we are all keen to progress and learn by others experiences but, we also have a responsibility to offer the correct advice.
So Just to be clear…. With this new information, we can safely say a 8” J tube connected to a large bell ‘can’ employ a 6” chimney?
Or are we now saying, in fact a 8” J tube connected to a large ball ‘should’ employ a 6” chimney?