Yea I talked to Terry today his are for the 3/4 shaft for any of the press on style. Ihad already thought about that but this is a keyed shaft and the key groove runs into the center so the bolt would only be an 1/8 long might as well weld one on just to get up and running. Do have the low down on another charger unit. Looks like I will be getting it as well so I have some back up parts as well.