This Feurich 190 has been cared for but not played very much lately so the action was a little sluggish. Most of that sluggishness came from the hammer flanges. However a little care and attention quickly eased them up and brought the touch weight down to where it was originally designed to be..about 52 grams. Wow, did the tone blossom after that!
Another critical part of touch is the ease with which the keys move. The front rail bushing is often the cause of sticking keys, but the balance rail hole is a frequent cause of sluggish or heavy feeling actions. On this piano, the balance rail hole was nicely eased. Go here to learn more about key easing.
This piano shows that with fine pianos, EVERYTHING plays a part in tone production.