I've noticed on my SS that the "doors" ("doors" - you know what I mean, but help this newbie with terminology - what is the correct word I should use?) .... anyway, I twist them down tight and that is as far as they will go. PERIOD! On my Slim Adjustable I twist them to the same level of tightness, and there is sort of a natural "stop" there, but then I noticed that I can twist them a fair amount further. Am I correct to assume I should stop closing at that first "natural stop feeling place", and not force it any further? Thanks!