The teeter can be a real problem for some dogs. It moves, makes a loud noise, and sometimes dogs mistaken it for the dogwalk and then are surprised when the floor drops out from under them. Seven appears to have no issues with the teeter.
As time goes on, Seven seems really solid in handling her environment, new things, and loud noises. She is old enough that I think if she were going to start developing phobias like Reagan did that I would start seeing hints of something by now. If anything, Seven is becoming more bombproof each day. That is a good thing!