@DoubleDAZ posted:Scott,
That was quick getting all the track laid. Your MTH stuff should work for a long time, but yeah, the timing could have been better. 😂
You might need an uncoupling track on the left blue spur to uncouple one caboose from another. If you only store spare engines on the purple tracks, you won’t need one there. Each of the green spurs needs one.
I’m not up to speed on when you need to turn power off these days. For sure you need to be able to turn it off wherever you plan to park an engine for any length of time so you don’t run up the operating hours just sitting, that means the purple spurs. And maybe the blue if any caboose has lights. Most people turn off sidings and spurs that aren’t being used so they don’t have to worry about parking powered cars there.
Thanks. I think I should throw toggle switches to each of the main tracks inside the yard (green, red, blue, purple). Not sure why I'd need to power off/on each green spur since I expect they're most likely to hold unlit freight cars. That said, it won't be difficult to run a jumper wire off the green main through a bank of switches to each spur/branch. I'll make space provisions for that as well and see how it operates. I'm also going to put the yard on a separate transformer since I have a plethora of old PW transformers and fast-blow fuses.
I attached pictures of the two ends of the actual yard. Came close to the design, but the yard width ended up being less than I figured, so I had to compress a bit on the left side. I still think it'll work fine as it's close to our (your) design. 
I think I have space for a 5th spur on the right (stub) end of the yard. Any reason not to do that? It might shorten the green yard lead into the spurs, but I don't see that as a problem, do you?
I'm also thinking about seeing if I can swap out the O27 engine escape switch off the red for an O42 switch. Some of my freight engines are OK with 27" curves, but some require 31" (none bigger than that). Might avoid some headaches but, given the space, I haven't quite figured out how to put in a 42" curve switch.
BTW - when I said I had the track laid, don't give me too much credit. It's not even screwed down yet, just pieced together and not an inch has been wired. I've only gotten roadbed under about half the track and nothing ballasted (which I don't plan to do until I've had many hours to operate and adjust).
