I have one of his on mine and yes, it makes it difficult to install the CV's, and you can't get to the idle adjust either. I cut a hole in the bottom of mine so I can at least get my idle screw if I have to. I'm going to run RS38's on mine soon anyway and I'll decide then weather it stays or goes. If it does go, it's going on the 90 track bike, but I would like to keep it on the 7/11 too. I might just have to live with the little inconvenience, but it's not like you have to constantly adjust the carbs on a street bike anyway. Also, the 7/11 is getting the fairing put back on the front. When it goes on, the cool air kit will be functional with the ducts and side covers, so to do it without the shield would be silly.
I was looking at the V&H bike and it also has a heat shield on it. That shield seems to have a lot more flex in it so I was thinking about making another one similar to that one. I have some silicone sheet that I thought about using to make one with more flexibility, but it might be too floppy. If they just had a little bit more flex in them, they would still function as intended, but they would be easier to work with as far as the install is concerned. But too much flex will make it floppy and it might not work as well as it should then. When I pull off the CV's and put on the RS's, I'm going to give that a try, if it works out I'll probably make a few of them and give you a heads up when I do.