I know this thread is getting old. But about the threads jumping modes or being loose. My Quark Mini Cr2 threads are extreemly tight to the point that it is almost a two hander. It will probably wear in just right.
Yeah, there seems to be some variety between samples. Some of it appears to be o-ring related as well. I can only write about the samples I get to test though so what you see, is what I got.