Reel Repair by Alan Tani

I got an old baitrunner from my grandfather that has been sitting for a long time and recently regreased it and made sure everything was in working order. Went out fishing this weekend and as soon as I got a fish on it the crank locked up and I ended up losing the fish.

Got home and started tearing it down to see what the issue was. I had to jiggle the rotor a good bit to get it off then these two half moon looking pieces came out and one was jammed into the base of the reel under the anti-reverse clutch. I can't find them on any schematics but I think they must be counterbalance weights. They have some corrosion but don't seem all that bad, I guess the just don't stay in the slot of the rotor. Should I glue these back in so they don't fall out of their slot or do I need to find replacements somehow?