didn't use it... sits way too high if you use the supplied nut. And even though it isn't extremely tight on there, it doesn't simply loosen itself...

 

I did not use it on mine. However, reading this thread I didn't know that there was a plastic threaded sleeve in there. I tightened mine by hand VERY tight and there was no indication that anything was going to fail inside. It's pretty tight now and over the course of a year or so, it only came loose once.

 

drove around with it for 2 days with the nut... gonna take it off it sits sooo high lol