A tip about keys..

The added weight won't do any real damage.

The main reason you don't want all those keys on your ring when you take your car in for service or repair is the tech now has your house keys and also has your address on the workorder. He can just make copies of your keys and come by later.

Techs in general are not thieves but you also never know who they are or what kind of person you are. When I worked as a tech at a dealer I always asked the service writers to have the customer take the car key off the ring and only give use that key and we told them why. They were very thankful that we were that honest

Chuck