Only got to 80kms? I don't really see what the issue is as long as its all running fine when you got it back.
On that note alot of places road test cars to check everythings ok, guess it depends what you mean by minor body modifications.
But seriously 2.6km? It's not like they went very far, nor very fast, and I doubt you would of noticed if you hadnt set the odometer/rsm.