Your approach to this is not overkill by any means. If you feel you need this kind of security to lock and protect your bike then more power to you.

But please do keep this in mind. The only thing any kind of lock does or ever will do is keep good people from doing bad things. If a thief wants your property bad enough and he or she has the time and the right tools, then guess what? They are going to steal it. The most any of us can ever do is do what we can to stop a thief from stealing our property.