I just got in 2 sets 0f carbontex drag washers for my Saltist 50s, only to find out that I can't loosen the screws. the reels are about 1 year old & have'nt been apart yet. Corrosion or Loktite causing the problem?. Any suggestions?The screw heads have slots w/ a hole in the center. Is there such a thing as an impact screwdriver?