Well, the Easton chart shows a 3-39 to be on the weak side. You should be using a 3-49 and possibly even a 3-60. Backing the poundage off to about 65 lbs. will likely help the spine issue, but will also probably make the left tear worse. No contact issues over on the right side of the arrow? Then I would move the arrow rest to the left and see what happens.