Ok everyone... got the gauge and installed it already in my e82. This install was super easy and I had it done in like 20 minutes.
So the question on every bodies mind is... does the gauge work with e82 128i?
I can say that it does without any issues. I will post some picture when I have a bit of time and a video showing that it works and the options that it displays.
Not to mention this thing looks really good.