The bow needs to be fine tuned by you using broadhead, that'll take care of the broadheads hitting a different point of impact than field points. As far as aligning the blades go, I don't understand what people are trying to accomplish. Are the blades and the vanes supposed to cut through the same swath or air, or are you looking for the vanes to cut through clean air? In either case you would have no way of knowing what is really happening. Think about it, an arrow isn't like a gun barrel that has a specific rate of twist. The spin rate of an arrow is variable and there's no way to predict exactly how fast it will spin, and the rate of spin will determine whether the vanes are travelling in the blades turbulance. As a matter of fact if you think about it an arrow starts out flying without a spin and as it travels through the air it starts spinning faster the farther it travels, the whole time it's slowing down. The idea of aligning broadheads with your vanes is a holdover from the days when we glued our broadheads onto cedar shaftsand we took every precaution in an effort to make our arrows fly straight. Here's a link to help you with the broadhead tuning.
http://redhawk-archery.com/bh-tuning.html