Following repair an Hitachi HT 40-S turntable’s armature counterweight needs re-installation. It has three (3) bored holes -- a larger central one with two (2) to each side, obviously to fit over three (3) similarly-sized rods extending to the rear past the armature’s pivot point. The central hole has an outer wheel-ring, numbered around its circumference from 0 to 2.5 (with the 0 point where a 3.0 would be). How does one fit back on, reattach and then adjust this armature counterweight?