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[quote user="riogrande5761"] Since I plan to run 89' auto racks and TOFC flat cars and this will be a helix, my thoughts are the broader the better.  I have room for 34 inch radius and an increase in 3 inches (over 31"R) at that range or radius could make a significant difference, especially since there will be grade and "grade equivelent" effects at play too. KATO does make the 34 1/8th but it would take a boat load of them and cost a small fortune.  So I may look at ways to mount flex track onto something precut to drop in in sections and connect them together. <div style="clear:both;"> </div> [/quote] You could try Micro Engineering track.  It generally holds its shape once you bend it.  It does take some getting used to working with it, but this would probably be easier and cheaper than using sectional track in the long run.  A Fast Tracks Sweepsticks guage will help you get it exactly the radius you want. <a href="https://www.handlaidtrack.com/sweepsticks-ho-curved">https://www.handlaidtrack.com/sweepsticks-ho-curved</a> If you decide to go this route, wait a few days and place your order in September, they donate 10% of sales to cancer research during the month of September.
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