I'm building up a TT bike, and I started installing the D/A 10 spd bar end shifters yesterday. The instruction sheet says that to use index mode for the rear, line up the SIS arrow with the red arrow on the dial thingamajob. Did that, and I get the clicks...great. Then it says, if you want to use friction mode, line up the friction arrow with the arrow on the dial. Uhhh, there is no friction arrow. Just the word "friction" and what seems to be a range of degree of friction. I lined up the dial arrow with points all along this "range", and the friction seems to be the same. So, where exactly do I turn the dial for friction mode? I want to make sure I've got it in the right place. I guess the possibility is there that if in the wrong spot, while still performing, you could be prematurely wearing some of the internals out.