I haven't worked on my layout much in the last two years but I know that I'm going to have to use O27 track on the inside rather than the O gauge I show in that video. The inside and outside tracks run too close and cars hit each other.
I don't use track software because I get frustrated with it. I just lay down track on the table and cut to fit. Sorry, guys, but I 'm not a real model railroader; I build to entertain my grandchildren.