I would like to provide photo neep for those interested in such things, but the fact is that these pictures were pretty much sheer luck. I was using a homemade solar filter constructed of cardboard, duct tape, and Baader AstroSolar Safety Film, made by my own ten thumbs. Throughout, I intended to keep my aperture at 11, and bracket every shot by changing the shutter speed. I took at least two more pictures for every one here. At the end of the shoot, I discovered that the aperture setting had changed wildly (I don't remember when, or to what).
Put it down to the luck of the amateur.