Checked all bolts for torque on left wing. Found 2 bolts too long, causing nut to to screw up onto unthreaded portion of shank. Replaced with shorter bolts and new nuts. Found 3 bolts too short (no thread visible outside the nut, including one which was too short to grab the nylon insert. Replaced. Harbour freight torque wrench did not release on first bolt. Replaced bolt and nut and changed wrenches.