Firstly, there's the matter of how much glue to apply. Two well-known instructors advised soaking the area between the tuning pin and the plate until the block won't take any more glue. The justification: that once the glue sets up, it somehow seals the block from receiving additional glue that may be needed – a use-it-or-lose-it approach. Others have advised using as little glue as possible. The problem for me with the second approach is that, until the glue hardens, it's sometimes hard to know when enough is enough. So, on my last two glue treatments I soaked one day and returned on another day to tune. The problem now is fearing I'll break a tuning pin; on these last two pianos the pins were so tight that I had to put my body weight into my lever to get them free. After a loud "crack" the pins broke free and were satisfactorily tight and maneuverable. These last two pianos held their tunings very well thereafter and the customers are happy. But I'm inclined to think doing the whole procedure in one day, still soaking the block, is the better practice. Anybody ever broken or bent a tuning pin this way? Any thoughts or experiences would be appreciated.