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I am known for poo hooing things and i am going to do so now.1/ have you done any calculations to do with gradient; i have 4% on an R2 curve and i wouldn't recommend it. Its an "S" bend as well.2/ what makes you think you need 12 " clearance?Dont forget R2 etc is a metric measurement and when using it you should try to think metric.I have an American double dogbone configuration in my area 3 and the track crosses over itself 3 times and you can get away with 200 mm from the top of the lower rail to the lowest part of your overhead but i would recommmend this as a last resort but 220 mm is quite adequate.Rgds Ian
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