I personally like the idea of getting the air in there the way I have. But as said, it's not strictly necessary. I went over the top trying to bullet proof mine.

But mine is not an inner wing set up, hence the reason I have done mine as I have.

One question (as I have no idea) when mounted in the wing, is the filter getting ****ted up more of a problem? As I say, not a clue, never seen one in the flesh