I'm shooting outside. I'm was seeing the fishtailing at 25 yards, in part because I caught it with my off-side eye as I follow thru with the hold.
Then to make sure, when my brother was over I had him standing behind me while I was shooting. The shafts are sticking with a slight cant, MAINLY one was at a given distance, but not all the same. So at 25 yards, most of them have a slight left cant, some more of one, some straight into the target, some canted to the right. Now that is with the 125gr points. With 85s they are pretty much straight in. And 31" puts the end of the shaft itself even with the front of the riser. (LOOONG arms)