Looks great! I really like both of them. Each pattern has unique qualities that make it feel like you aren't seeing the same color scheme over and over. Nicely done!
Yeah those ridges on the inside of the 3DS make it hard for a skin to fit it well.
The cool things about the skins, too, is that they are able to flex around lumps and rises, it just takes a little bit of rubbing to get them to finally mould to the shape.