who has problems screwing in the oil fill? its plastic, has coarse threads, buy I always seem to start it cross threaded. I haven't ruined it yet. Has anyone replaced it with a metal plug with maybe a magnet on it? I have searched but came up empty. I figured I would replace some parts while the Engine is out and getting rebuilt. Thanks guys!

I always start with reverse turning until you feel the male thread drop into the groove.THEN start your screwing in.
It eliminates cross threading unless your threads are already damaged.
Happy screwing!