Amazing collection of yoyos! Very well focused and beautifully presented! I love your display case. I have a very similar glass display case for my action figures, but the back panel on mine is a piece of board made to look like a dark wood finish. Your case looks very much like an Ikea Detolf case, which are some of the best glass curio cabinets for presenting collections. Do you have lights installed in it yet? You can configure that case with some really nice LED light strips to fit the underside of each shelf with the wires mounted along the sides of the metal frame for a clean look. I use Ikea soft white LEDs in mine and it looks awesome.