I have found that when I paper tune bows at the shop that the ones that I have the most trouble with are the ones that are much too long of a draw for me. The longer the draw, the more likely I am to get a left tear. Shorter draw length bows and ones at my draw length offer little problem.
Just a thought. Any possibility your DL is too long?
1. Left tail tear usually indicates an arrow that is too weak, or weak spIned for the specific bow.
Causes: arrow too long, static spine of arrow simply too weak ( for instance, shooting a 400 spine arrow on a 70lb draw weight bow, etc), arrow point too heavy for arrow.
More often than not though, you are torquing your bow hand. Here is a tip for you. Shoot 3 arrows with your normal grip through your paper tune jig, then, shoot 3 arrows through the jig while touching the tip of your bow hand thumb to the tip of your bow hand index finger.. Typically a left tear archer will see the left tear go away that simply.