Hi Kin: There are many questions one would ask before giving an opinion. How long have you had the piano? How new is it? Has it always been this way, or did it just begin happening? How do other Kawai grands of the same model feel? Its always hard to give a long distance answer, but here goes: The touchweight should be around 50 grams, so your figure of 68 seems quite high. The first thing to look at is friction, which if excessive will cause a heavy touch. If this checks out OK, then weighting the keys is an answer, but it begs the question, was the piano made this way, or has something happened since it was put into service? It might be worth your while to get another opinion from someone familiar with the Stanwood system of measuring and correcting keyweight. This is a recognized technique of very precisely dealing with your problem. Not every technician will be familiar or experienced, but persistance will pay off in getting the correct answer. Hope this helps....PNO2NER.