Received two of these units and they looked as though they may have been returns or repackaged for some reason.  All the [parts were there, but the instructions for assembly are horrible.  The boards that make up the bottom of the box are either incorrectly cut or the unit is a bad design because the fit allows them to slide and leave gaps.  Why have drain holes if the box is designed to have gaps in the bottom.  I am going to try to center the bottom boards over the 1X2's and secure them in place.  The liner "should" take care of the gaps at either end.  Would not recommend this item for purchase, spend a little more and ghet one that is better quality.