[pianotech] Field Hammer shank replacement

[Ron Nossaman]

> P.S.
> On the Sheet Metal/shank removal system, I forgot to give a date: 1975!
> (before I passed the R.P.T. (then it was R.T.T.), test.<G>
> Joe Garrett, R.P.T. (Oregon)

Gettin' old Joe. When I did it in 78, it was still "Craftsman", not RTT.
Ron N