Thanks for the imput guys. I may have used a bad word in referring to the mighty NIMBA.......Peening. I obviously used the wrong word. I could swear though that I read something about cast steel anvils and relieving internal stressses before heavy use by "tapping" the entire face with a hammer lightly. Maybe I should stop reading then. Sorry if it sounds like a dumb question to the experienced guys. Any members from MN out there?