I believe that HO-19 in this case is the "Narrow Switching Railroad" from HO Layouts for Every Space. Lots of track, which serves Atlas' interests. Not the most enjoyable and engaging track plan for the long term, IMHO.
As always, there is nothing which guarantees that a published plan is the best choice for a given space.
I don't know of anyone who has ever built this as drawn and have not seen photos of it online that I recall.
Byron
Layout Design GalleryLayout Design Special Interest Group
Do an internet search of that Atlas layout, and maybe some pictures of a completed version might show up.
Mike.
My You Tube
I'm not sure if I should be posting this here or the layout section, but I was wondering if anyone knew where I could find pictures of any completed Atlas book layouts? Specifically the HO19 layout?