That is a thorough and well explained post Bob, and I understand your viewpoint. Something to keep in mind is exactly what I had mentioned in my previous post, and that is that the difference between the rail sizes is hard to tell without magnification. My scale says 33 mm between the rails in that pic you posted showing the different rail heights, or a magnification of about 360%. Here is that image resized so that it displays at exactly 9mm between the rails on my monitor. Not quite so dramatic without being magnified several times. If you then took a picture of this same set of rails from the side and above as it will be seen on a layout the difference gets pretty hard to tell. And then if they are all ballasted it gets even harder to see the difference. It is good that some folks take the effort to get these tiny details right so that we can all see "museum quality" modeling, even if the difference is only noticeable in highly magnified pictures. I do not however think that being obsessed with absolute accuracy is how most people want to enjoy this hobby, as evidenced in this thread. Good enough really is good enough for most people, especially if it requires magnification to see "better" detailing.