My old 9X42 C Lathe came with tooling. It came with a 10 in. steady rest that fits into a disk that fits into the compound's seat in the cross slide. It sits at the proper center line of the work but there is no way to lock it in place. The top of the mount in the cross slide is threaded but there is no grasping or locking to keep the steadyrest from spinning around. I can't figure it out.