[pianotech] Square Grand Keypins & Backchecks

[David Skolnik]

Terry -
Bill Spurlock has a #11 polyethylene bushing caul measuring 0.152", 
which should work pretty well.

http://www.spurlocktools.com/id19.htm

Sorry, can't help on the backchecks.

David Skolnik
Hastings on Hudson, NY



At 01:42 PM 5/31/2012, you wrote:
>Front rail keypins are 0.146" - so no sweat there. However, the 
>balance rail keypins are 0.154" - what's up with that? Any recommendations?
>
>I was thinking of trying my new bottle of Pianotek Profelt - but 
>they don't have cauls for a 0.154" hole. I suppose I should just 
>replace the bushings anyway........ Any thoughts?
>
>Other item is backchecks. Looks like the originals had two layers of 
>leather on the back and then on the front, one layer of leather and 
>then a thick layer of dense felt - something like hammer felt. 
>Anyone know what type of felt this is - and a source?
>
>
>
>
>
>Thanks!
>
>Terry Farrell