I rebuilt 60052 into a different train with different cargo and vehicles, using only parts from the original set (excluding extras). I'll share the instructions at some point, and maybe try another
ONLY instructions Books 1-6 Lego 60052 Cargo Train railroad; no bricks/parts 673419207805 | eBay
Amazon.com: LEGO City Cargo Train 60052 Train Toy : Toys & Games
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Lego City 60052 INSTRUCTION MANUAL ONLY Cargo Train | eBay