@kennythekey
I too own the Kallax units for my LPs/gear display. I added some ripped 2x4s across the back of the Kallax units and secured them with threaded wood screws. This did the trick of helping to solidify the units and prevent the LP from sliding too far back. At the time I bought the Kallax, the Eket line was not in production, otehrwise I would have considered it as a storage option.
I too own the Kallax units for my LPs/gear display. I added some ripped 2x4s across the back of the Kallax units and secured them with threaded wood screws. This did the trick of helping to solidify the units and prevent the LP from sliding too far back. At the time I bought the Kallax, the Eket line was not in production, otehrwise I would have considered it as a storage option.