I am trying to replace the seal assembly on my Hayward Super Pump. Two of the three rear screws came out easily, but the third is locked in and when I try to take it out it slowly stripping the screw head. I have tried lots of WD40 to no avail. Can I drill the screw out if I am careful not to let the drill go in too deep? I definitely do not want to drill the capacitor in there!