Just a buyer beware I guess. Tweety had her first 100hr and I had the mechanic replace one of the pushrod tubes, it had a small ding where someone had slipped a wrench or something. Should have left it alone. He pulled the cylinder to replace it and looked inside the case- why I don't know, mechanics being mechanics I guess. He found some major rust on the camshaft. Small maintenance turns into major teardown. Man. Prebuy had great compressions, logs looked good, factory reman last overhaul even. Clean engine, ran smooth. But I guess it sat somewhere too long with high humidity. Sigh. Big thing to miss. Ouch. Have to cash out the retirement funds to fix this I suppose.