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Track Radius Rails
Gary has a question for others in the hobby:
“I have two HO radius pieces that I cannot connect perfectly and I am concerned that my cars might derail upon moving over that connection. Any suggestions to join those two pieces better?”
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I take there is a gap in the connection. You can solder the gap then file it smooth on the rail side where the wheel flange meets the rail.
You could try replacing those two pieces with a section of flexi-track, that will adopt the curve better.
I second Eric. Fit each rail to suit.