[The Newell]

The Turbo spins at a very fast RPM. It is hard to tell how big a very small chip is. I would have it replaced if it were mine. If the shop isn't worried then I would get that in writing. Some sort of warranty would be in order in my mind. What I would worry about is if there is hair line cracks that you can't see. I would hate to see you shell out your turbo and have to find all the parts in places that may require a top end tare down. I would stand my ground on a replacement turbo if I thought they did the damage.