My fingernails are very black - a DIY look is not a great thing, even among miners. Nevertheless, my bottom bracket is back in place. Removing a crankset is a nerve wrecking endeavour. As the threading is very fine, and the material is very soft, it is quite easy to strip the threading. Unable to get the crank remover straight, or should I say at the correct angle, I stripped a few threads. Nevertheless it has been removed.
The bearings have crowns. They are an older technology that make assembly easier, but have the downside of wearing out and adding impurities to the bearing chamber possibly increasing the wear on the balls and racers. Fortunately the crowns are made of a very soft steel, made into fine dust rather than pitting out the bottom bracket crucial components.
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