RE: Is my new set up sufficient for Elk?
The LX is a good bow. I would recommend that you stay with the bow you have. Just order some 70 lb limbs and you can start lighter and work your way up to 70lbs. In the process you might try the 125 gr. heads but since you should still be ok on spine with your current arrows (at least by the charts) the 125s may or may not cause you to be underspined. If they do cause you to be underspined I would ditch the 125s and stay with the 100s and stick with the arrows that you are shooting.