First key I filed down to short and it spun inside the taper lock.second time I made everthing perfect and still sherred key off inside the taperlock.Maybe belt tension to loose or to tight???MPI says they have never heard of that problem,don't think i believe that one.Anyone ever had that problem and how do you fix it??I'm sick of fixing the pullies and belt after ever trip out.There must be a better way!!!!Any help would be great.Thanks