The "underpowered" reputation came primarily from the starter train set small steamers. Outside of some early efforts which could be corrected in a repair shop, most anything derived from genuine postwar lineage tended to be fine. So the dual-motor F3s, the GG1's, the small Hudson and Berkshire derivatives, the N&W J and unique to the MPC era J-derived Daylight, the various postwar-derived diesels -- all of them could pull well and held up much like their postwar counterparts.
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