Glen c-mag question

Hopefully your C has a raised 2 or 3 on side of casting and that designates it's one of the later made improved C housings. Early C mags had rotor tubes that bushing fit in come loose inside of aluminum housing. They fixed the problem once with a better tube anchoring but then during WWII years good aluminum was not available and some more housings had tubes coming loose inside. Wico made a factory effort to fix that by replacing those but many still out there that didn't get replaced before that program expired and by then the Wico XH was coming out also. When that steel tube comes loose in aluminum all you can do is find another housing or mag and part the other one out. They also had same problems back then with some screws coming loose that held shaft to magnet.