well, the leaking of oil into the spark plug wells most probably comes not from the outer, rectangular-shaped part of the gasket, but from the gasket "rings" in the middle. Most likely, they´re not fully seating where they should, either because of their position or because of wrong amount of torque on the bolts. I thought at first: the tighter, the better, right? since we´re trying to avoid leaks. I was told that´s not necessary true, and that by not tightening the bolts too much, you are just leaving the room the gasket needs to expand (due to temperature increase) thus keeping the oil from leaking out. Although I have no number for the amount of torque used on these bolts. I´m keeping a close eye on my valve cover, haven´t seen any leaking so far. But I know it´s leaking from somewhere else. I´m going to keep on replacing gaskets to see if it stops. The one I took from the valve cover looked just fine, but it was leaking, so I guess we can´t tell just by how it looks (at least I can´t). Next one up is the lower pan. I need to get me a torque wrench.