I have never met Mr. John Schwaner. But I have admired his work for many years. We all owe a debt of gratitude to John for maintaining one of the most comprehensive web-pages on the subject of piston engines. His information is useful to aircraft owners, pilots, mechanics, and anyone interested in engine maintenance and safety. If you don't have time to look though his blog right now, you'll regret it later if you don't tag it as a bookmark. Take a glance and you'll see what I mean.