Re: spark plug oil leak
O.K., first of all, too much oil will not help the rings to seat. Running at various throttle and rpm settings will, but you need to seat the rings in the first tank of fuel or so to be done properly.
Now, I have seen a very small amount of oil leaking by the plugs on a few of these, not a big deal, and may stop after some running.
Don't use anything but anti sieze compound on the plug threads and avoid removing the plug from a hot engine.