I just received this light a day ago, and it is phenomenal! I was wondering about the light control ring, however. Mine is very smooth, and it doesn't rattle or is not loose, but I have noticed that it has a little up/down play when I adj. it. I am almost positive it has to have a little play like this in order to function so smoothly, but I am interested in hearing from other RRT owners out there to see if they have noticed similar characteristics in their lights. Also, how has the control ring setup held up in general; has anyone had any trouble with theirs? Thanks for any input!