still not a fan of the fingers, I think it has more to do with the fact that there's no way the fingers can pivot back nd forth. It just looks like it wouldn't work (Which doesn't matter I know! but it does ) how about some pincer claws or something?

Also get a reflection map on there (doesn't have to be accurate) you just need some reflections to help sell the metal look. It will make you're render really look fantastic

Alan