Does anyone have one of these Dremel 732 motor flexible drive units? If so is it possible someone could give me the details of the flexible drive inner core. This part is no longer available and is missing totally from my Dremel. I see no reason why I can't make one if I can find the details of it. The cable seems to screw onto the motor with what looks like a 9/32 x 40 thread and the hand piece seems to be driven by a 4mm round shaft with a key on the side of it. I can probably improvise from that but proper measurements would be better.