AC-DC, Transformers, Selectors, Controllers, Reverse Loops,..Electrifying
Plus A&B Cabs and multiple tracks.
I have wired two other layouts with no issues one 40 years ago the other twenty. Looked at a diagram and wired them up. No problems.
Then came yesterday. Forgot everything that I knew. Not a rookie, I have a background in electronics. Everything just tacked together, wanted to be sure everything worked before I hard wired. Nothing worked. Long day and I was tired.
Awoke at 2am, thought about it, changed one wire this morning and everything works. The power of sleep.