posting on bahalf of my brother - he recently got the Santa Fe 28249 from the 31748 set released in 2007. It's a full size model with TMCC and such. He's running on 0-31 lionel tubular track and the manual has it rated for 0-31 minimum curves, however he is having derail issues in the curves, left and right turns and forward and reverse. It runs ok on fast track. The trucks are 3 axle and all wheels are full flange. Anyone have experience with this engine or similar on 0-31?
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