Preparing for Bedding, Key Level, and Strike Samples:
Choose which keys will be bedding samples, naturals only, one beside each glidebolt including hidden ones (glidebolts are the balancerail's points of greatest stability and adjustment sensitivity). And choose a mid-range leveling sample (E44 when available). Then, remove front punchings from these samples to a machine screw provided by Sampling Kit or Leveling-Sampling Kit. In their place, install Keysteps, also from the kit.