Yes, I agree. And with some threadlocker on the set screw, I've never had a failure.

I got to add. When I was in my teens flying controline and used collars, I can remember losing wheels on takeoff. Friends would wave and tell me that I only had one wheel, really fun landing that way. As I progressed, I would epoxy my collars (way overkill). Now with threadlocker and a good notch ground with a Dremel, they never fail. To loosen, just heat up with a soldering iron. But I like the idea of soldering close fitting washers .