Don't Try This At Home (In the House)

I was getting frustrated with my old walk behind lawn spreader getting clogged up all the time and having to spend the entire day putting down 'turf builders'. . It was old, had bad wheels, what other things can I find wrong with it to justify spending too much money on a new one I can pull behind my lawn tractor. I didn't have good light in the garage and wanted to use it this morning so I brought the box in the house and assembled it in the dining room. What I didn't do was measure or read the finished measurements of the assembled unit! Now how to get it OUT the door.