Using sandpaper on tuning pins.

[Kent Swafford]

There was a time when I might have agreed with your characterization  
of sandpaper shims. But not now.

I was a late adopter of CA in pinblocks. I had seen terrible results  
using epoxy to tighten pins, and I wrongly assumed the worst about CA.

All this to say I used sandpaper shims for a good long time. Every one  
I put in, I did so with the assumption that it was a stop-gap measure.

You know what? Those sandpaper shims I put in during the early 1990's  
mostly on ancient Steinway A's and O's are all holding nicely. In  
fact, they tune so nicely that they blend right in and I can't tell  
which pins have shims and which don't.

After 15 years, I wouldn't call them short-term.


Kent



On Jul 20, 2008, at 6:33 PM, paulrevenkojones at aol.com wrote:

>
> David:
>
> Yes. For how long under bearing and friction pressure? Look at a few  
> pins under a microscope sometime to see the abrasion. Even with the  
> grit side out. It's a useful short-term half-measure if there's  
> nothing else to do in the field. But not a pretty one.
>
> Paul

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