That is indeed disappointing. The whistle steam effect is a lot fun! I had planned to purchase the ATSF Berk.....but I may pass now.
I am curious as to why the feature was not included as originally advertised in the catalog. In the past, when such omissions/errors have occurred did Lionel offer an explanation? Shouldn't the lack of this feature push the price point down? Although I should know better than to think that, as I have learned you can not translate features into the Lionel pricing structure.
Also, wouldn't Lionel have done the R & D and built a mock-up prior to publishing the feature in the catalog? I have the CC2 and it has to have a shorter boiler than the Berk, so I would imagine the second smoke generator would have fit (of course I say that having never seen the interior of a K-Line Berk shell).
These are just the ramblings of a disappointed potential Berk customer.