Debbie, of all the Community that we've had the pleasure of meeting so far, you are one of the people for whom we have the greatest respect. Such kind words from your good self are extremely appreciated, and mean one helluva lot to us. Thank-you. April, Thank-you. Crescent, that's a useful bit of info, thanks....there was a link posted by JetM earlier in this thread, pointing to some info about replacing materials in the ambient channel