I have exactly the same. Absolutely no problems so far after about 12 flights including a
most humbling high speed nose in from about 40 ft. If yours won't easily unscrew, chances are the factory used a little loctite on it because of early complaints of a few coming apart. Probably also implies that you have metal gears and probably also have lubricant factory installed. I didn't unscrew mine because it has loctite and I'm trusting they lubed it. If not, I know I can get replacement. I like mine so much I just bought another.
good luck with yours!
Gary