Dangit! 2 holes away from completion & I broke an M3 tap. I really cant say how, the preceding ones went perfectly fine & I did all the holes & tapping operation identically. It was a brand new, good quality tap, chip ejecting style which I've had excellent good results with in the past. Lots of WD40, controlled tapping.... Anyway, I finished tapping the last 2 holes while it was all set up on the rotary then removed part to examine. I tried heating the CC up to expand a little & gripping the 1mm tap remnant but it just crumbled. Now its now essentially flush. I really don't feel in the mood to start another CC right now. Any successful experience or solutions you can recommend? The hole is 0.300" deep & suspect the tap is 0.250". I can't seem to locate prior threads, Alum or something? And no, I don't have access to EDM nor am I interested in building one.