Chernobieff Piano Restorations
See p. 6 of the PACE Grand Regulation book for a simple and dependable method.
This refers to an excellent article on key frame bedding written by Bill Spurlock. One interesting point from the article is Bill advocates against raising all the glide bolts up so that that none are touching the keybed. He points out that doing this can "ruin existing key level and dip settings".
Most articles I have read about key frame bedding recommend the opposite and advice you to start by tuning up all of the glide bolts. Even the instructions that come with the WNG tool recommend turning up all of the glide bolts before starting.
I've never tested Bill's statement but I have always wondered if turning them all up will cause a significant change in key leveling and dip leading to unnecessary and extra work. Does anyone have an opinion on this?
From Chris: Instead of using your hand, it's better to have a good tool.
I took a piano hammer and added a handle to it for knocking. Helped a lot. I also made a low profile wrench for turning the glide bolts. That helped too.
Any chance you could post a photo?