Revamping your old ukulele tuning machines

Some of us just really love vintage ukuleles!  I get a big kick out of playing an instrument that is 50+ years old.  But one of the problems that I've encountered in my collection of vintage ukes is that often the tuning machines aren't functioning properly.  The usual culprit is years and years of sitting idly in someone's attic, closet, garage, etc.  To make matters worse, today's standard tuning machines are often to big to fit the little holes drilled into the ukes of yesteryear.

Replacing those old tuning machines can be done, but it can be quite an arduous task.  A tapered reamer (like this one offered by Grizzly) is a handy tool to have for widening up those holes a bit...and it's a much