Hello guys!!!
Well, I see that Montmil pretty much covered everything...
Just in case, here is my experience on the one in the pics:
1. We did not do any special maesurement to determine the position of the holes... You will see that once you have the fairing in your hands, you will be able to tell pretty close where they go. Although, we discover that the fairing is not perfectly symmetric when we fitted it and realize there was a slight difference on the indicator steem position on both sides... so, one ended up a little bit closer to the egde of the hole than the other, but you can hardly notice it when you see it.
2. What would I do the next time? I will try to drill the holes a little bit smaller. I might want to use a homemade rubber gasket for the separation that is between the headlight and the fairing main hole. The R65LS gasket we used is not thick enough to cover it, so that´s a pending task.
3-4.We used a 1.5" (I think) metal hole driller, and actually, we didin´t need to use any sand paper to finish it, the cut went out clean from the begining... we used a 4 speed driller, being 4 the fastest, we used speed 3. There was a little bit of heating... now that I read what Monte says, next time I will be more careful about the heating issue.
About driving, I agree with Steve, there is a little bit more noise and you feel a little bit more the crossed winds (nothing to worry about). The body resistance against wind was not noticeable, but I discovered, when riding above the 100kph, if you lower your head, it does get a lot better. But there ir a bonus, as far as I live in the tropics, where it rains a lot and heavy, the fairing kinda forms an air protection barrier, whch has made more confortable riding under water.
Besides that, I suggest replacing the bolts that attaches the windshield to the fairing, as long as they are not stainless steel, and got a little bit of corrosion pretty fast.
The bottom line is, the fairing is mostly a "looks" accesory more than "functional", which was my main reason to install it.
In the future, I will try one of those "fly screen" cafe ones, they look nice and kinda easy to install!!!
Take care guys, hope it helps!!
Fernando