bigbulls, I hear what you are saying but my arrows aren't flying sideways or anything. My penetration has been great (5 passthroughs on whitetails last year with the STs) but the accuracy hasn't been consistent.
I actually know quite a few experienced archers that have had trouble getting fixed blades to fly with their fieldpoints. A bow or an arrowcan be just a little out of tune and fixed blads accuracy can suffer. The blades are like vanes on the front of the arrows. How is that not going to effect arrow flight? Add some wind in and see what happens in comparison to field points.

I am happy for those with the knowledge and ability to tinker with your bow until you get get the broadheads tuned. I'm jealous in fact. It hasn't happened for me yet.