Reply to "The Allegheny, Conemaugh, and Cumberland -bench work is done (mostly) on to laying track!"

Wow, a complex plan!  Interesting!   I see that the lowest layer is almost filled with track, so no opportunity for access areas except in the center of the turnback loops.   Are you thinking you can get under the layout and reach up in those areas?

You may want to have the lowest staging level a bit higher, at say 42" or more, so that if you are working inside the mountains, you aren't so cramped.