Received my MEC SW7 from Charles Ro and took it to a friends house for a test run yesterday. Nice engine - it ran perfectly except for one problem. The frame mounted coupler doesn't swing far enough on O31 curves - it pulls the connected truck off the rails in every postwar car we tried (included gondolas with extra weight added). The layout is a mix of O31 and O42 and we had no problem on O42 curves. I need to build a carpet central test track and try O36 Fastrack
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