Joe- do you run your mainlines in the background or foreground? Just curious, as my layout will be around the room 8 x 9- 1/2.For what it's worth, My benchwork is 24" deep. My curves are 32" and 30". It's all about the placement. I really don't have a problem with 24" radius curves for that matter, although you are limited with regard to some longer equipment. However, if you are dealing with an 8'x10' space, you are already dealing with limitations. The object is to build something you will enjoy operating, and not something that will frustrate you.
Code 100 supposedly scales out to prototype 136lb / 155 lb rail, which is quite a lot to step over in real life. But on a model railroad, Code 100 rail doesn't really look out of place, especially when weathered. The ties may be a tad big, but again with ballast and weathering this flaw disappears.
I use code 70, because I like the appearance, but we work with what we have available.
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