Stacked a kallax 2x4 & 3x4 on top of a 5x5. But now I'm having doubts. It's mounted to the (very old) brick wall, as shown in the picture. Do you think
Kallax Wooden Panel Made of Beech Wood Solid Wooden Top - Etsy
39 IKEA Kallax Shelf Hacks - YouTube
Amazon.com: Ikea ' New KALLAX Shelf Unit, Black-Brown (Black, 44 1/8x57 7/8) : Home & Kitchen