Regarding the oil blowing on the fuse, I have installed the Du Bro rubber exhaust deflectors, hoping that it will keep some of it away from the plane, but really can't tell what will happen until it flies. I suspect Jim is right, that the prop wash is going to plaster it all over the place. I have had some cases where putting on the deflector made it worse, I think by the fact that it collects the oil and rather than getting blown out in a spray, just blows off in drops and more of it gets on the fuse, stab, etc.
Randy