[CAUT] Crescendo punchings

[johnparham at piano88.com]

"We have a spring loaded gauge that we use to measure bushing cloth,
etc. and when we put the Crescendo punchings in it, it compresses about
.010 to .020 less than standard green punchings of about the same
thickness."

Jim,

Could you send us a picture of this spring loaded gauge in action?  I
wonder how other people test effective compression in felt/wool?

-John Parham