I know what you are getting at bigbulls. It's always been my impression that arrows do not spin fast enough for blades to cause enough turbulance to interfere with the workings of the fletching. It has been determined recently that many carbon arrow have a weak and/or stif side for spine. In this case it probably can help to determine just where that side is (floating the shafts) and fletch arrows so they are all at least consistent. Then maybe turn all broadheads so they are oriented the same, consistency being the key.

My experience, though, is that within the realm of normal hunting distances all this isn't going to make a big difference. Surely not as much as having the right spined arrows to start with and knowing how to tune the complete setup. And of course, having fairly consistent shooting form, which is the most important part anyway. Ya can't tune if ya can't shoot.