why not still use the curved PECO TO's? they should be able to make with atlas, without too much trouble.
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Besides the obvious difference in the look of the track, the tie height and rail web of the Peco track makes it less compatible than using it with Atlas code 80. I don't want to give up the look of the Atlas code 55 turnouts, either.
I emailed my question to MR and got a reply back, from david Popp himself. He thinks using #7 urnouts in plce of the curved ones, and placing them before the curve, will work.
Jim F