WHILE INSTALLING BOLTS ON SIDE SEGMENTS USING 1"" AIR GUN TO DRIVE AND TIGHTEN. FIRS BOLT NOT PULLING IN RIGHT. REVERSED GUN TO REMOVE NUT. BOLT STARTED SPINNING IN BORE. REACHED OVER ON THE BACK SIDE INTO A BLIND SPOT TO KEEP BOLT FROM SPINNING. HIT TRIGGER ON GUN. BOLT ROTATED PINCHING FINGER BETWEEN BOLT AND FINAL.