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Thanks! I've used 4 shelf brackets similar to these: http://www.toolstation.com/shop/Ironmongery/d170/S...I don't remember the size of the brackets any more, but I used 2 big ones for the round cabinet and 2 small ones for the small cabinet. The brackets were fixed against the wall and both cabinets have little slots in the back so they could just slide over. Add a few screws to prevent it sliding back and you're done.