Dash kit & steering wheel harness question

theDreamer

So after my first audio/screen setup was stolen I redid it as below, one or two minor things. I need the steering wheel control module, have a kenwood DNX6980, so not sure if one is better than another? Need to know what can be done about the edges of my dash kit. Picture below on the right side you can see the extra piece fitted to make it 'look flush' when it is not. Will buying the metra dash kit allow it to sit flush on both sides without adding these extra pieces to hide the holes?

Right side of pic:

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