Originally Posted by
dddd
When aero levers became the norm, I adapted my Mirrycle with a 4mm high-strength bolt by drilling and tapping the slender lever housing "point". It actually worked, and I used it that way for several years on my Trek 720.
Well, well, well, I thought I was the only one to do that. I fit the older model Mirrycle to a set of 105 brake levers and a set of Dia Comp aero levers just the way you noted. I filed off the levers' "points" to make a small flat and drilled and tapped them 10-32. It worked very well but STI/Ergo levers ended all of that.
Since then I've been using the Third Eye bar end mirror and it also functions well. It's not as much in your line of sight as the Mirrycle but they are steady and do give a good view. However, they are even less crashworthy then the Mirrycle. Unfortunately the latest Mirrycle won't work with Ergo brifters so I'm stuck with my Third Eye.