Not long ago I was given a QL17. It appears to be in very good shape.. mostly. Lens is clean, shutter speeds nearly spot on with the exception of 1/500. I'm in the process of replacing the light seals. Removing the old gunk was, let's just say tedious. My real question is in regards to the battery contacts. I noticed I can't get a batt. check reading. Examining the battery chamber I notice the negative contact looks to be some sort of brass spherical nub. I tried cleaning it up, but it seems so recessed, I'm wondering if it is even contacting the battery surface. Is this contact spring loaded or anything and is just stuck in a recessed position?