ro347......you see, even an old fart, with year's of flying, can learn new trick's......i never knew how to take a motor apart like you just did.....i've alway's ran quality o.s. product's and alway's the higher-end, better performing sf-fx-ax stuff.....that and the fact that i alway's run my fuel out and add after-run oil before i put my planes up, i've never had an engine rust or gum-up or lock-up......i've still got a couple of o.s. motor's that i've been flying for well over 15 year's, i think each one of them have been in 6-7 different planes over the year's.....kinda say's something about the after-run oil debate???.....it's all a matter of preference/opinion when it come's to after-run oil.....now if i ever do need to tear a motor apart, it won't be a problem, thanx to this thread......KOOLKRABBER47.......