Originally Posted by
cplager
What you did was actually what I was planning on doing. The reason I went further is because I wanted to be able to take the mitts off easily if it got warm if I made only a small hole that the mirror stem could come out of, I'd need to take off the mirror everytime I wanted to put on/remove the mitt.
The one thing that I'll point out is that where I was planning on putting the hole (in the corner) isn't actually where I would have wanted the hole (which is several inches from the corner).
My bike with the bar mitts has studded tires on it, so it only gets used in the cold. My solution would not work for a bike I regularly wanted to remove the bar mitts. I take the mirror off whenever I need to re-cable the bike and that's it.
And yes, I had to put my hands in, figure out where the hole should be and put it there. It was several inches back from the corner.