When I bought my D200, I also bought the battery grip. It worked well for about a year, then I started to have problems with it. The short story is there was some kind of contact problem between the D200 and the grip. I'm thinking about getting another one, but don't want to spend the money if the problem is the body, not the grip. Any thoughts on how I can determine whether the source of the problem is the body or the grip? Thanks!