Here is my solution for the times I want a larger cone on my Dynatron, the one that uses the standard small one inch cone but only on occasion. It was home machined to fit over the standard small cone with the rubber removed and just two set screws and its converts to two inch cone in seconds. Far better and less difficult that switching out the alum aftermarket large cones.

Just my solution for a bit more versatility with This starter, I run with either 18 or 24 volt Black and Decker.

John