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. 

Solve Excessive Friction:

Friction is a necessary and useful component of piano action mechanics. Too much causes trouble in one direction and too little, trouble in the other. The best balance optimizes performance and the player's control of tone. How much is just right and how is it measured? I have found that for the sum of keys and top action, 17 grams gives the ideal balance between control and freedom, stability and repetition. The fastest and most effective way to observe and calculate this sum employs David Stanwood's concept of balanceweight.