Thanks for the help! We were able to get the counterweight off today. What was holding us up was that when the bolt broke about 1/2" of it was still protruding into the counterweights hole. We drilled into what was still protruding with progressively bigger drill bits until it weakened enough to let the counterweight come loose. I was worried we were missing a fasteners somewhere. Reading your explanation helped us figure out how it was attached. Thanks again!