When you're attaching the pull-up bar, the instructions will tell you to use washers that you are out of. This is where you use the curved washers that the instructions don't call for. I put the whole thing together before I realized that. : \ I think it tells you to use washers "26", but you need "27". Oh and make sure you attach the push-up bars on the bottom, facing in the right direction-tall end toward the center. Oops. Great product!