<html> <grin> For an old wreck with sprung hammer felt, I've used the glue trick, only with clamps for awhile. I took the sprung hammers out first. It makes them a lot easier to deal with. 5.2 ....... hmmm. ......... could it be gently slowing down the CA bonding? And how on earth would you test the pH of the two glues mixed together? They make a big bonding clot. Glad you've had such a good holiday, John. Susan At 11:18 AM 8/23/2005 -0500, you wrote: <blockquote type=cite class=cite cite>Back from the Beach!!  Grand Isle is a great place, although it was hot as you-know-what.  Blue crab, $25.00 a bushel yum!   Anyway, I checked the pH of Elmer s white glue, it s 5.2.  So it really shouldn t be accelerating CA glue (which need moisture, and hydroxyl ion for reaction).  I ll check the buffering capacity when I get some time, may be the CA glue has enough base to overcome the Elmer s pH.  I wish I could try some experiments to determine the relative bonding strengths, bonding and curing times for various mixtures, but with the Louisiana humidity, it s gonna be tough for me to find a dry place to do the tests.  Maybe someone in the desert Southwest would be interested in collaborating?   I bought the previously mentioned Brinkerhoff lab piano yesterday.  Talked her down to $50.00 after looking at it.  For my purposes, it seems ideal has a couple of any kind of problem you ( I ) can imagine.  Couple of broken hammer shanks (keys 1 & 2 though), about 3 broken string (really high treble), some sprung hammer heads.  Keeping in mind the purpose of this piano (a learning tool I m not looking to resale for a profit), does anyone have any advice for a temporary fix for the sprung hammer heads?  I know the tone will be crappy, and I will replace all the hammers when I get to that point, but for now, I d just like to stabilize them.  Just glue the felt back down and clamp? (BTW, this is not the piano I m learning to tune on that would be a nightmare!)   John Delmore</blockquote></html>