Sorry - wrong tweeze :-)
BTW, I had read somewhere that the Ghost piezos were less "quacky" than others, despite the hotter output. But, I will comment with real data once I get them installed.
My (biggest) issue wasn't the quack, but the fact that several of my saddles sounded very dead and/or had reduced volume. I had cleaned the pockets out and reseated them, put on new strings, etc, but nothing seemed to help. I had thought about getting the individual replacement saddles, but I think the Graph Tech saddle looks to just be a better design. I don't want to be replacing saddles on a regular basis... Hopefully the Graph Tech Ghosts work well...