Downweight

[Newton Hunt]

Your friction is too low.  At four grams pianists will have too little
to push against.

I would suggest reducing the inertia by reducing key weight, decrease
spring tension and put friction control screws in the shanks.

I would suggest aiming for a balance weight of about 42 grams without
springs and adjust the spring tension to get 36 to 38 grams balance
weight.  

Get in touch with David Stanwood for his recommendations.

	Newton
	nhunt@jagat.com