An agricultural tilling assembly has an elongate structure, and at least one ground engaging tool sub- assembly that is secured to or within the elongate structure. The sub-assembly includes a hub having a mounting portion, a ground engaging tool that is arranged to be secured to the hub or integrally formed therewith, and a weight having a body with an open aperture formed with a mouth, the mouth being configured to enable the weight plate to be threaded over the elongate structure so that the elongate structure extends through the open aperture, and the open aperture being configured so that the weight plate in at least a first orientation can be thereafter manoeuvred over at least 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 formed so that it can be connected to a respective one of the hubs of the tilling assembly whilst that hub is retained interconnected
