[pianotech] Filling screw holes

[paulmulik at yahoo.com]

A school that I tune for has a Kawai grand, and about a third of the little screws from the long hinge (connecting the front lid to the main lid) have fallen out. I've told them repeatedly that if they need to move the piano around the room they must not push on the lid (I even left a note to the lid warning against it), and of course they have ignored this advice. 

In the past I tried replacing them with slightly longer screws but those have fallen out too. Obviously I need to fill the holes with something, I guess using a syringe, but what?  Epoxy? Wood filler? Thick CA? 

Thanks,
Paul Mulik
Sent from my U.S. Cellular BlackBerry® smartphone