From: "David Stinson" <arc5 at ix.netcom.com> Sent: Wednesday, December 10, 2014 11:02:38 AM >> >> Cut off a chunck and drop it in bicarb of soda water. >> If the end bubbles, it's acid core. Thanks, Dave, that's a GREAT idea! Now... hmmm... what'd the XYL do with the box of bicarb?? :-) Rick WA1RKT