You know, I finally had an opportunity to hear the real thing (again) as I had to have an old crown replaced. In this case, it wasn't so much drilling as cutting, but I thought to myself at the time that it was very different from the sound [this one] I had posted on freesound. Oh well. Still kind of interesting.
Thanks. Sometimes I think this sort of thing might be more generally useful if it were a "drier" sound, meaning not so much of the ambient/reverberant component. Oh well, it is what it is, and maybe someone someday will find it useful. :-)