Questions: Is the piano already torn down to the bare plate? Can you better describe the crack? The reason is this: I once had a small Kawai baby grand in which the bottom laminations had come apart (apparantly from some idiot who attempted to solve the "loose-pin-itis condition by DRIVING the pins to the hilt without support) and since this was a dealer piano (i.e.save me some money) kind of thing I tried this and it worked well. With the piano torn down (no strings or pins) I taped off the bottom of the pin-block with duct tape (I suppose heavy masking tape would work) to cover all the holes in that section, then forced wood glue down into all the holes of the affected area, then with a laminated pin block support (APSCO or SCHAFF has it) placed underneath the area SOWLY & GRADUALLY raise it so as to squeeze the lamination back into place. This could get messy because the glue will obviously be under pressure and ooze out. Just be prepared with a lot of paper towels or damp rags. I hope by now you've figured out that the pinblock support has become a huge clamp!. After getting everything set where it ought to be (close as possible to where it was origionally) just clean up the excess glue, maybe take a suction device (like a rubber baby-booger sucker-if you have kids you know what I'm talking about) and suck out as much glue from the tuning pin holes as you can, then let it dry for a couple days or more if you can wait that long. Then remove the support, drill out all the holes in the area at least one size over and re-string. This sounds like a lot of work but the actual time it took for me was about 3 hrs. (not including drying time and re-stringing, of course!) I have shared this with a few other technicians and at first they thought it was crazy, but, hey, It Worked! The piano was finished and turned out rather nice. Good Luck!
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