Okay, this has got to be TMI by its very nature, but if you don't mind sharing, when do you consider it low/mid/high? I was wondering how others determine this.
*personally* I mark "low" when I barely have to go in.

and "high" when I seriously can BARELY reach it, or reach just enough to know it's still in there, but not actually reach the opening but marking "midway" is more confusing to me.. I mark that when I have to uh, "reach" but not AS far as high.. but then I sit there going.. well, is that actually "high" becuase I'm reaching? OR sometimes it's not "right there" but it's not way as far as having to "reach", so then I wonder "is it low or medium?" lol And then I debate about it and am confused.
Soooo... how do you guys mark it?