I had to rebake this today, had some smoothing errors due to the wooden section sharing one smoothing group. I could have baked it down to a single plane but opted for some extra geometry although it's not silhouette defining (I'm conscious my models are too simple).
To resolve the smoothing issue I made the bevels slightly shallower and split the groups (but not the uv shells) so that's all fixed up and there's no noticeable normal bleeding (huzzah!)