Curious to see what folks experience with this little guy is. I have one mounted at 12 O'clock on a 300 BO build, and I have to say this is the most frustrating aiming device I've ever dealt with. No markings on adjustments, no tactile clicks, the directions only reference moving the dot not point of impact. And of course everything has to be done under NODS which has its own challenges. I guess with the price point I can't complain. The dot is very usable, but trying to get it zeroed at 50 yds is driving me nuts. Anyone run one of these? Thoughts? thanks