I have a grand piano with an extremely heavy/stiff action. Is it possible to lighten the action without completely rebuilding it? Is this something a professional piano tuner would do or would I have to find someone else with this specific skill/training?
(In case it matters, this is an old 5'8" Kimball Viennese Classic)
I am aware of the importance of good posture, fingering, using arm weight properly, etc., but I'm just learning so my skill is low and it's difficult to improve when I can't practice more than 15-20 minutes at a time due to fatigue.