I recently installed new h/s/f on a restrung Hamburg M. Ronsen Bacon felt Hammers with WNG s/f (flex 3).
I really like the new s/f. I bored the hammers .003" larger than the shanks and chamfered both sides on a drill press.
I dry fit the tapered hammers and applied CA to the front and back. The bevel allowed the glue to wick into the joint. I applied it twice.
Then I removed them from the rail to cut off the protruding c/f shank and rough-cut the arc on the band saw.
Spurlock's Hammer Tapering Jig finished the arc. Then graduated their SW. re-leaded the keyset after a survey.
It came out exceptionally well except for the bass.
A0 and A#0 sound hollow, nasally. There is excessive (I mean excessive = a lot) d/b in the middle of the bass bridge.
I think the board is squashed and the s-curve is affecting the low tenor as well.
There is also excessive side bearing, I'm surprised the cap hadn't split.
Repairs to the bridge will not happen due to the owner exceeding their budget already.
I attached photos of the bearing and a video of the tone in a second post.
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Regards,
Jon Page
mailto:
jonpage@comcast.nethttp://www.pianocapecod.com------------------------------