pulley key repair kit

[Tvak@aol.com]

Just bought the pulley key repair kit from Schaff.  Anybody have any 
experiences with this, bad or good?  

Looks basically like it would work.  There's a drill bit to bore a recess 
into the bottom of the key surrounding the elongated balance rail pin hole, 
into which you insert a little wooden donut which has a proper sized hole.  

I seem to recall reading about a method of sawing into the bottom of the key 
on the elongated side of the hole and inserting a piece of veneer to resize 
it...  Whereas I'd probably screw that up, this seems do-able, even for a 
klutz like me.

Any guidance is appreciated.  I hesitate to proceed further for fear that I 
might irreversibly ruin this plywood-soundboard/no serial #/no name spinet 
piano.

Just practicing,
Tom Sivak