I think it was all the walking that did me in. Tear a piece out, walk it to the garage, repeat, and many trips for 'some other tool'. Didn't look like much till I got into it. First -take door off, shelves out, remove 10 shelf supports(screws painted over and so stripped, I m really not sure what drive they were supposed to be (Square got about half of them) Then took apart door frame. - 7 2x4's in a 2x2 inside closet, Thats enough to build a 16" wall!