Southern Pacific Switching Layout

[faraway]

Reinhard,Looks like your #4s are sharper then the Atlas C-L #4.

I still recommend Atlas #4 C-Ls over any other small switch even though I've used the Atlas "snap" switch on small 1'x6' ISLs.Doing so requires 4 axle switchers and 40' cars

The #4 turnouts on the photo are:
561 #4 Custom-Line® Turnout Left and 562 #4 Custom-Line® Turnout Right
I got the numbers from the web catalog of my LHS where I bought them and looked the numbers up at the Atlas web side to cut the text inserted above.

However, I fully agree that the Atlas #4 is a very good choice if there is no space for a #6. As you explained the Atlas #4 is in fact a #4.5