Just assembled this unit yesterday.  In addition to tools listed in the instructions I needed 10 mm and 13mm wrenches and sockets.  Ends and sides did not fit together without gaps at top or bottom, not flush top to bottom.  Star (Phillips) heads on screws are too small for good grip.  Some screws had to be put in at an angle because holes did not perfectly match receptacles.  Difficult to believe that the box will be waterproof let alone water resistant in the foul weather common here at 8,600 ft. in the Rocky Mountains.  I will caulk inside and out but I suggest applying caulk to all seams, bottoms and sides and ends, as they are assembled, then inside and out.  Why is there a significant openings to the outside at the hinge elbows?