OK CH, We are good. When you pull a bottom tappet after a flight on a humid day, collect the oil that drains out. You will not believe the amount of water globules in with the oil. I should get a micro-scale separatory funnel and collect the drainage. A half ml of water separating from the oil would not surprise me. There will still be a gob that has condensed all over the inside of the crankcase. The 9-90 is much more prone to this problem than the 7-70.That is the reason for the aquarium air pump, dry it out! It takes literally 5 seconds to put the aquarium tubing on the brass guide and let it run overnight. Easy piesy .(I think that is how you spell that) I recall you had a concern with removing pushrods and followers in cowled planes . My corsair is tightly cowled and it is still easy. Well anyway you will get a lot of fun and satisfaction with running these engines. They sure reinstated enjoyment for me in this hobby.