I did not know that. I do know the two chuff sound chuffs, as currently released by Lionel, sound more like my FEF-3 steam 4-8-4, than the earlier Lionel 6-11210 Vision Line Challenger #3967 steam 4-6-6-4. Shouldn't technology be moving the sound systems forward toward greater realism? $2,000.00 is a lot of money for something that is not quite right. A half way effort should have a half-off price.
Sincerely, John Rowlen