Kitagawa hydraulic chucks for lathes, magnetic milling chucks, history of buck chucks.
There is no way that the spigot can be left on the finished piece without reshaping it. My reason for not considering the Vicmark offerings when was buying chucks in the early 1990 was their limited selection of accessory jaws and that they were awkward for me to use drill chucks because of their CCW rotation discussed separately at the time. There is no advantage to using the larger chuck whose holding capacity exceeds that of the lathe.