Good job Bull Dog! Redrilling any bolt out is a lot more difficult than it sounds. Oftentimes the drill goes off center of what we are drilling and it really messes up the threads. Sounds to me like you did it right the first time!GOT IT!!!! I went and bought a left drill bit and a decent ez out and a tap to chase the threads. Took a little doing, had to run a pilot hole cuz my lefty wasn't biting. But after the pilot hole, it dug most of the screw out. Got the rest with the ez out. The chased the threads, and bingo! Filled my primary, put in new gasket, installed new derby cover using anti-seize. Looks great! Way better than buying a new outer primary case. HUGE THANKS GUYS!!!