Well trying to remove the aio waterblick from pc and all threads were stuffed. Rotating in back plate when screwing. Basically the thread insert in the plastic was spinning. No alternative in the end but to drill them out CAREFULLY. Three went well but the fourth grabbed and ripped its way through. Doesn't look great... Have I screwed some of the PC lanes? Can it be fixed? Is it terminal? Advice welcome. Specs in my dual system thread a few pages in. Romulus computer.. Sigh.