Pete: I use a system that in effect, is similar to yours. I use short starters, so I drill a hole abut 1/2" deep into the knob which fits loosely over the end of my ramrod. I lock the starter onto the rod simply by moving one of the fingers of my pushing hand onto the junction of the knob and rob, and that way, the knob doesn't slip off the rod and pinch your hand. The immense surface area of the knob makes pushing down a tight combination easy peasy.