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Hi Steve, Sorry - it is probably just me - but now I am more confused as to what you are asking.... These questions are more for me... [;)] Are you simply feeding power at 20 different locations? If yes, abandon the terminal strips, and run feeders to the rails directly from the bus. When you say "some switches have ground throws, the others are electric" you are talking about turnouts. If you want to power these with switch machines, you should have an independent pwer supply, and not run them from either track power (never), or from the same power pack (only if you have a few to operate - throwing them may temporarily slow your train). So, provide a bit more info if you could, and let's keep discussing! I am sure someone else will be along who can also provide advice...! Andrew
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