An agricultural tilling assembly has an elongate structure, and at least one ground engaging tool sub-assembly. The sub-assembly includes a hub having a mounting portion, a ground engaging tool securable to the hub or integrally formed therewith, and a weight having a body with an open aperture having a mouth, the mouth configured for enabling the weight plate to be threaded over the elongate structure so that the elongate structure extends through the aperture, and the open aperture configured so that the weight plate is maneuverable over a portion of a length of the hub whilst in situ on the elongate structure and to be beatable on the mounting portion. The ground engaging tool is connectable to a respective one of the hubs of the tilling assembly whilst that hub is retained interconnected in situ on the tilling assembly, and without removing another ground engaging tool from the tilling assembly.