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
LEGO MOC SD40-2 Locomotive (Ex-60052-1) by NottaCadmonkey | Rebrickable - Build with LEGO
Lego 9v Rc Trains Flatbed Cargo Car - MOC - 60052 7939 4512 60098 4563 4565 7989 | eBay
LEGO MOC 60052 Lightning Bolt by wwwchrisde | Rebrickable - Build with LEGO