Not to jump in on the thread but I have a point for Scaletrax:
Folks complain about the lack of switch selection, with reason.
However, If you put ScaleTrax on 5mm Roadbed (Standard Woodland Scenics) and lay a 2mm sheet of cork (Amazon) under any Ross Switch the rails line right up.
And Ross rails are shaped like the Scaletrax rails, but are just a tad taller. The Ross ties are huge! Then again, they are real wood ties, a bit more size helps keep them from splitting when tacking rails to them.
Paul:
As far as connecting and screwing down Scaletrax, see the videos from www.toytrainsontracks.com they detail how to make a wonderful layout using ScaleTrax. You might even get the info you need from the demo clips on the website. I have the first 2, need to pick up the latest one. They also include some video of his trains running on the layout and real trains running. It's Fun to just watch those sections as well.
As far as the Large Flanges causing problems I know of only one engine with that issue and it has trouble on many types of track, especially with the switches.