CA gluing Grand pinblocks

[Baldwin Yamaha Piano Centre]

Hi Joe,
              We cut up two blocks to examine the results. Both pianos had 
no plate bushings.
The thin CA had wicked down the pin holes to a depth of about 1/4" to 3/8". 
After cutting through the holes we run the side of the block through the 
disc sander, the glue had wicked into the end grain by about 1.5mm about 
half that for the cross grain, as far as we could tell with a bright light 
and a magnifying glass.

As a test we put some 2.0 pins back in the removed block, just tapping them 
in to just grip. Then we applied CA from the bottom so there was a little 
pool around the edge of the pin, and let it set up. Next day we cut the 
block and sanded. It had penetrated about 1/2" down the pin and seemed to 
have wicked about the same down the drain.

Not too scientific, but good enough to convince me that bottom application 
is better.

We have a Kawai KG2 in the shop at the moment, that looks like some one 
tried to treat the block with a few bottles, what a mess.  If there was any 
improvement in tuning stability, I would be surprised. None of the CA 
reached the block. If there was any increase in holding power it would have 
come from gluing the plate bushing to the plate and the pin to the 
bushing.  Needless to say we are installing a new block.

A thought as I type, is to treat the next candidate from both the top and 
the bottom.  I think the torque may come up to better than just 
acceptable.maybe even the 100lb range.  It will be worth trying.

Now Back to my cool beer.

Regards Roger