I have just acquired a Bair 317-100 powder/bullet scale from one of our favorite auction sites, and need to adjust the balance point of the scale. My antique Pacific scales have an almost identical balance bar on them, and are adjusted by loosening two nuts on the pan end of the scale and moving them to balance and tighten them back together. On the Bair 317-100 there is a brass cylindrical piece in place of the nut carrying screw on the Pacific. There is a threaded hole coming in from the end of the brass end piece, which I think may have a small Allen headed screw down inside of it. Is this the adjustment?