The eliminator buttons do come stock from the factory and your bow should have came with the cable rod dampner also. Maybe someone took it off but it could have been forgotten at the factory, though not likely.

Don't look past the aluminum shafts for the most K.E.!!! Just try some 2315's or 2514's and see if they don't shoot like a dream and make your bow very quiet. Speed is not all that different in trajectory out to 30 yards or better,,,, where 95% of the hunting shots are taken.