Thanks to the experts like Arthur Dalton, W. Hunter and john, problem solved! ( I dont know what us amutaurs would do without them) Thanks again, bought some nkg bp5es and improvement right away! Bosh doesnt show any of the W series on their website, although the dealer does have the O WD. I have had many excellent suggestions from Tech help on the forum and appreciate same. Regards, Abe G PS My few contributions have consisted mainly of WD 40 use. Hit my 80th birthday last week.!! keep up the good work.