I hope i won't have any issues with the smoke detector having a shelf below it. If so i'll remove top shelf. The shelving has wider shelves on bottom 4 shelves, 9". The upper 4 are 7" wide. New wood , some of it from left over projects, some from reclaimed resources. Air nailer came in handy. I used shoe molding to support shelves. All tied into studs. See next pic about bottom.
Putting art and collectables on the shelves. I jumped up and down on floor to see if anything might topple. Hanging it from the wall made stable surfaces, plus they appear level. The book case i had there earlier was un level and made the living room appear crooked. Well it is! As all get out, but ... Now it looks straighter. Magic