Swapping a motor used to mean editing a spreadsheet and the model. Now it is one click and one undo.
Early concepts are full of placeholders: a motor of about this size, a battery of about that capacity. Turning them into real part numbers is slow, and every swap changes the mass and the hover time.
Compare lists the real industry parts that fit where yours sits, with mass, size and performance in the same columns. Pick one and every copy in the design is swapped, the physics re-checks and the strip at the top shows the new numbers.
Every number in the catalogue keeps its source, so a reviewer can check where it came from.