Do It Yourself: Yes
I had this idea since the retrofitting of the rain and light sensor but there was a setback, the windscreen. To have it fixed on the original windscreen is doable but it does not look proper and nice. Since I had my windscreen replaced, the idea of having it emerged. In PSA term, auto dimming mirror is called electrochromatic mirror, P/N: 8154.Jx and it is from 307 part bin actually.