Your not done cutting those brackets off right? Just from what you wrote it sounds like your done cutting.
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Whats in the red box needs to be removed.
At the risk of sounding like a dick, I would suggest that you stop working for a bit and do a little research on here by checking out other peoples project threads on what needs to be done to bag the front. It seems that doing this would answer most of your questions, and I would hate to see you cutting something off and making it more of a pain in the ass than it needs to be.