This is the stump, upturned, showing the depression I've chiselled out to allow me to more easily plane the rim flat and level. When I have some more time I'll shape the dip to a more even, semi-circular, one which I can use to preform metal discs prior to raising. The chisels I used are part of a set I bought from the French company Ariou. They held their edge very well and withstood the very hard wood and severe beating I gave them without the slightest complaint. That's a big thumbs up to Ariou from me.