I bought one of these bobtach to 3 pt convert attachments. I just wrote this in the homade forum on another thread. They are cheap enough and work ok, but the lower connections are fixed as opposed to a tractor 3 pt set up where the mower arms can swing in and out to accomodate width. I have found I have to build some sort of adapter so each separate implement will fit so it a bit of a pain.You can buy Attachment plates for Bobctach to 3pt. This way you can use your box blade with both machines. I am looking to put a box blade on my 743B.