I'm not trying to stir this thread up anymore but, another thought on the starter eating issue. Previous posts hinted Roush made the suggestion one brand fit better than the Lakewood unit.
Lakewood recommends checking the alignment (runout on the hole for the transmission) due to manufacturing tolerances and offers offset dowels for ensuring alignment.
It might a contributing problem to starter misalignment (not indexed properly to crank center). And again it might not.
