If I recall correctly, any piece of gear with a listed capacity cost can be installed in a cyberlimb. so you wouldn't need the handheld housing for the geiger counter, you can just put it in the limb.Although, IMO, you're missing what you can do with the limb. I would go with something like this: Obvious Cyberleg (customized to racial maximum STR/AGI) with STR +3 (3), AGI +3 (3), Armor +3 (3), Cyber Holster (5), Hydraulic Jack 6 (6). This means that if I need to kick something, it's going to be severely damaged (at least), I can get my gun into places where it's not allowed, and I have more armor than it appears I do.Of course, I trend toward a more physical character type, so YMMV with my approach.