Acrylic revolving earring display Showcase (32 pcs of 2" cards)

Bought this for my 2” x 2” earring cards for a display. Where the cards are supposed to sit has no backing for the cards to stay.. they just fall backwards. If I could submit a picture, I would

I had another earring display which I had purchased elsewhere but it kept falling over. The one I ordered from Zakka is well made and doesn't tip. Just what I needed!

Real brain power on display. Thanks for that anwesr!