Thanks, Joe. I appreciate the compliment. One of the things you want to check is the actual stud spacing while you are detecting. Our kids old house has 2x4" full dimension studs set parallel to the wall direction and on 24" centers. Their house was built 160 years ago so contacting the builder with a complaint might be a problem. But Joe is correct that the electrical box may be another clue as to where the studs are. That's part of the detecting work.