Ill have to get a look at that oring in the morning. Trail beast, are you saying you plugged the vent hole with epoxy? Or are we talking about one in the tail housing?
Yes, clean the oil off of the yoke real well and plug the hole in the yoke with epoxy. (the stuff you mix)
I liked to get the outside first and then drip a little on the inside of the yoke hole also.
I always felt a lot better about a good seal if it had it on both sides.
Just be carfull to not get any on the splines (Or if you do, wipe it off before it sets)