<html> <body> Hi Alan,               I ground down a hammer shank so I could block off the top of the  BR hole inside the mortice.   Then measured with a machinist depth gauge, from the bottom of the shank, to the bass of the key. Researching the spongy touch problem, I must have measured several hundred different keys, on many different makes and models of pianos.   Old and new. The problem was far more endemic than I ever imagined.   The only manufacturer that had, what I would consider accurate consistency, was Yamaha.   Well,  the way machine every thing, should I be surprised? =-O Jon gave a good suggestion. Place the key on a solid wood surface and then ream away.  Sounds dummy proof to me. The actual reaming of a complete set only takes us about 20mins. regards Roger At 04:05 PM 2/8/2006, you wrote: <blockquote type=cite class=cite cite="">The happy pirate wrote a couple of good posts this AM about checking/modifying the depth of the BR hole in the keystick.   What's the easiest way to accurately measure that depth?   Alan Barnard Salem, Missouri   </blockquote></body> </html>