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I have a similar problem, I am also endeavouring to build the Tehachapi, (out of a book and photos, not been to USA never mind Tehachapi. But would have to agree with nfmisso, a go for further planning and try to achieve 30" rads. <br />I decided to slightly modify the approaches from both sides using slightly tighter rads down to 26 & 28" and the loop 32". <br />I trialed by just lying track on a flat area with radii’s in place and run some of my rolling stock around to get the visual effect. I have Cab Forwards also get around. The loop is probably going to be the main focal point, and sharp curves will spoil your effect and may also possibly give you no end of trouble in running. <br />Suggestion spend a little more time try and get the larger curves where ever possible, I have minimum aisle width in some areas down to 20" just enough to get through to the main cab areas, I also use DDC. <br />
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