Ordered this attachment for my B530 bench and really pleased I did. It was simple to assemble and very good for the money, a nice addition to my home gym. I use my olympic plates with this and have gone up to 65kg (done at my own risk like other user commented) despite the machine supposedly only able to handle 40kg. You don't need to be strapped into a seat to work your lats, if you feel you do then you are simply using weights which are too heavy for you, you aren't using proper form and are only exercising your ego. Buy it.