You need to get the bow wrapped and protected in a vice. Cut the rod off about 1/8th inch above riser. Use a drill bit just a shade smaller than the rod in your bow. Now be very carful and use a verrible speed drill. Do not just drill normal, but tap-tap-tap. Be carfull as when you get to the bottom, the rod is in with JB weld and as soon as the bitt hits it it will sort of grab. The JB will turn to dust, then just clean it out and finish. It is not as hard as it sounds, just use good tools and your head.