Thank you very much Rich...but what is a nerve hole and when someone says "grind"...I get visions of the dentist...and do you have Dr. Kenny Craigs' email address....maybe I could send it off to him and let him check it out. And your right about getting hooked...I was just telling Michael S. the other day how much I liked the crest and seals and was getting the bug for them...now I get this thing and woosh....here we go...thanks to James he led me to a link on Roberts page...which all but confirmed it isn't bone...but it also got me looking at Roberts page again and hmmmmm....gonna have to order a crest or 2.....thanks again for your help.
Jim