Nice corsair and you seemed to have plenty of power!
I got back in town from Germany this wednesday and have already been to my flying field twice. Recall my discussion on corrosion with the 9-90 a couple of weeks ago. I believe I have an effective program now. You have completed your last flight for the day. Now allow the engine to cool down fully after running the fuel out of it. Then remove one of the bottom most pushrods and follower. Allow the oil to drain. If you have a white bottle cap to catch some of the oil you will see water globules in with the oil. Now remove one of the upper rods and follower. Inject in air tool oil (10 ml) and rotate the prop a few times and soon much oil will drain out the bottom tappet hole. It will still have a few globules but less and the oil will be clearer. Repeat one more time and put the followers back along with the push rods. I can do this even with a cowled engine. The next day the engines were slicker than ever. Just this morning I checked the engine that was run two days ago and yep smooth as silk. This sounds like much work. Took less than 5 minutes and now no worries!! The 9-90 now has 80 flights and is solid as a rock. -Tom