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    What is a good clearance for the edge of a layout on a 22" radius loop back ?

    What would you recommend as a good out edge of the layout distance where the track loops back? The outer track is 22" radius. So when I cut the road bed ( cook cutter technique ) the outer edge would be at WHAT radius? I was thinking 25" or 3" from the 22'' track center to allow space to put...




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