Thanks, problem is that anvil always moves with the tightenings. I can loosen it easy, move it up or down, then when trying to tighten it it just moves the anvil. Like I need basically a third hand or a special tool to hold the anvil in place.
Maybe if I use vise to hold anvil and just play with the hex nut and the screw? Would that be a better method, or it just takes a lot of practice/experience/patience?