just a short technical query: are the exhausts of each cylinders somehow connected on their way out (so called 2-1-2 system) or does each cylinder have its own exhaust with no link to the other one (2-2)?
From the behaviour I would say 2-1-2 (steam going out from both pipes on idle), from general engine construction I would also assume 2-1-2 but that still gives me no real idea

Thanks in advance,
Martin