I’d like to check out my brake drum, shoes , cylinder for any possible leaks, and in general clean things up. Having trouble removing the brake drum. I noticed two holes in-between the studs. I suspect they might be for inserting a screw , tightening the screw and forcing the drum off. If this is true, what size screw do I need? One other thing, suggest other ways of removing the drum... Have looked all over the internet. You’re my last chance for success.