Allan's best practices are already compiled on his website There are no absolute rules. There are simply lots of good ideas and methods of wiring a layout to make it more reliable and trouble free in the long run with plenty of explanations and as to why. Your trains will not necessarily or suddenly stop if you violate one or two of the recommended practices. But they can. And there is the root reason to have recommended practices.

There will always be plenty of anecdotal stories as evidence that you can get by with 'cheating' on any one of the recommended guidelines or methods. The simple reason is that there so many variables, and acceptable performance expectations by different folks, that one simple set of rigid rules will not cover every possible combination of problems or solutions. Nor will it necessarily please everyone because it "seems" to work OK without it. 


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