Been sitting here assembling it for a lil while now and the back piece won’t go over shelves - I have tried every combo moving the top one to the third slat … each time I try a different slot a lil bit of the wood knicks off so after a long day of packing up my classroom this was a let- down & im still not done assembling it but I had to hit pause bc I spent 40 bucks for shelves that I have to build myself that don’t fit