<html> <body> Terry, I just went back to tune a old upright piano today that I had treated with CA via syringe with the piano standing up, there was little room for laying it down.  I had the same problem with the deep bass rapidly swinging the tuning hammer back as soon as I let go of it.  I followed the treatment with a pitch-raise.  I did the upper first and then came back down to the pins I had treated. The second time around I lowered the pitch first in case any CA had made it down to the pins on the plate just below the tuning pins.  There was a definite feel of "breaking loose".  I was worried about that but the torque staid good for this, the second tuning.  More loose pins have turned up in the treble as well as a lot of false beats in the killer octave.  I tried leveling the strings below the pressure bar but that didn't make much difference so I'll be looking at CAing the pins on the bridge, maybe; removing the strings first from them might not fit their budget.  Has a lot of loose center pins too, flat and grooved hammers etc. just have to convince them to buy a new piano. Andrew At 09:51 AM 3/8/2004 -0500, you wrote: <blockquote type=cite class=cite cite>FYI:   I CA-treated the pinblock of an old upright six months ago. Dozens of pins were so loose that they immediately spun back on their own after raising the pitch. I tipped the piano back and applied two bottles of thin CA (after spending 20 minutes trying to talk the lady into dumping the piano). It was quite apparent that the pins had been doped some years ago - plate was all stained at the tuning pins and the feel of the few pins that had any torque was very spongy. The CA treatment seems to work well a couple days later when I pitch-raised and tuned the piano.   I went back there last night to tune. Three pins had let go. I gave them a tap or two and they then had a very solid feel. All the other tuning pins had good to great torque and very good feel.   This piano had a full plate with no tuning pin bushings.   Bottom line: CA worked great on this previously doped block. Your results may vary.   Terry Farrell</blockquote></body> </html>