Ron's post is enough to scare one away from doing this. I did find this post from 2012 with pictures of all the track systems.
https://ogrforum.ogaugerr.com/...vs-atlas-availabilty
I like what #4's do for my yard plans. I chose the Atlas system over 10 years ago and have been pleased with it though I have experienced some of the problems with the first generation of switches. I have been lobbying Atlas at York for a #4 and a O90/O72 curved switches. They did say that they have completed upgrading there current switches and plan to do #4 and an O63.
For now I cannot do anything but wait as my train room and garage have been full of my friends household goods since Hurricane Michael. All I can do is plan and then plan some more.
Jan