Upgraded with drawers and knobs several years ago and finally got around to adding the legs on the Kallax! The legs weren't as long as I'd wanted, but I was just ready
IKEA Kallax Shelves with Drawer Inserts, Furniture & Home Living, Furniture, Shelves, Cabinets & Racks on Carousell
31+ Genius IKEA Kallax Hacks To Organize Your Entire Home