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That's gonna bind on the G, hasn't it? There are distinctly different hard angles coming into the nut and going out of the nut. Further, being half ontop of the nut, there's yet more friction and potential for binding, isn't there?
I'd say the same issue with the B.
Your D looks nice.
I say that because I've been rather irked with the G string on my SG Special, so took some time working the nut slots. It looks really ugly now, but I have much smoother angles, no binding at all. Since I did that (3 weeks ago or so?), the guitar has stayed in tune perfectly.
Here:
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This was the thought process: a curve coming into the nut and through the nut then leaving in a straight line to the bridge. I know it looks really ugly, but it's the best tuning stability that I've ever had with a Gibson G string, so I'm happy. I also wanted a deep channel, so there's no side or bottom friction that could contribute to binding problems.
I hasten to add: I know nothing, so the luthiers and fellas who know will probably (rightly) tell me that my solution is an awful one.