Any photos Dave? Your description is a little tough to follow, are all the cleats attached to the head knocker swivel, i.e it has 2 cleats instead of one?
Mike might have some photos. Yes the 2 cleats are in line and attached to a plate that attaches to the swivel. Take off the existing cleat and make a plate long enough to mount 2 cleats in line and mount using existing cleat bolts and holes. The line just goes through both cleats and they work together.
