In a message dated 8/16/05 10:53:08 AM US Mountain Standard Time, RoboMan91324 at aol.com writes: > Any ideas on this? > A couple........ 1) See the article in a recent Communique for details. 2) Use filters based on the PF-4 design. 3) Clark's has excellent PF-4-type filters at cheap prices. Regards, Bob Helt