Jim S,
IMO you are making a big mistake in your choice of track, mostly because of the constant lack of availability of their Track and the inability of the track to accommodate many Tin Plate Trains. I love the Atlas company and have lots of their great rolling stock, however I leave their track and switches alone. I do own some Atlas Industrial Rail Track which is very very good stuff, and accommodates all different kinds of trains, availability on this track is also a problem however. The low voltage track I recommend are RMT (K-Line Super Snap), Ross and FasTrack. Remember Ross Track & Switches however do not accommodate most Tin Plate Trains, but are top dog for post war and modern trains. I run FasTrack because it accommodates all trains and has wireless Low voltage command control switches, controlled from the Legacy Cab2 remote control. If you like Conventional Tubular, RMT (K-Line SS) track and switches accommodate all different kinds of trains also. Atlas track is hard to get/replace and limits which kind of trains you can run on your layout.
PCRR/Dave