I have the above mentioned equipment. I have had a terrible problem with the front of the PTO drive line attaching to the snowblower. Specifically the set screw that clamps down on the keyway. The set screw will become loose and the it is riding only on the shear bolt and then it is only a matter of time before it breaks. The set screw has been set in locktite. I am about ready to weld the damn thing. Does anyone have any ideas?