Just got back from a first ride with the new mirror risers, and they rock!
I can see three lanes wide behind me!
I can now see the left & right lane fully (full left view in the left mirror, and full right view in the right mirror, converging together at about 10-ft behind me), and my blindspot is about the size of a man standing behind me about as big as me.
I can almost see the rear turn signals of my own bike in my mirrors now!
I'll be adding a second thin-walled 1"o.d. steel pipe with rubber wrapping the aluminum pipe and slid into the new steel pipe for a totally snug fit (like the all-thread has done to it inside the aluminum pipe), and will be making 2 pairs of steel plates to go between the larger risers and the windscreen & the mirror bases.
It's already rock solid, and has zero vibration, but I want to make sure it stays like that.
But it's working super fine