I am wondering if anyone has experience with a different kind of mirror on the CT110. I find that the standard ones are rather fussy in how they thread in and END UP at the wrong spot. The so-called "adjusting nut" doesn't appear to move (is it supposed to move?); I was thinking that some mirrors have a lock nut on the threads below the main nut; that would make adjusting and locking the mirror in the proper place, MUCH easier (I think). Any thoughts? thanks.