Conceal matte lines with an edge matte

At this point I have a matte that has no chatter,…but it is simply too choked.…If I play it in motion, you'll see that…there's just a lot of missing detail.…And in fact, you can see that also…by comparing the original with the keyed version.…So I'm actually going to back off my adjustment…and show you how to create an edge matte that allows me…to blend the background and foreground together.…The first step here is just to eliminate this levels effect…that is what's choking that matte.…

I'm going to get rid of Channel Blur as well…and just go back to the original extract.…So here I'll lower the white point…and then, increase the amount of softness…so that it spans that entire spike that you see.…And that's the sky in the background.…If I solo the layer,…you can clearly see we've got pretty strong matte lines.…My next step is to duplicate this.…And I'm going to do it in a way that may not be necessary,…but I'll copy it with property links…and paste it up at the top.…

Now that means that if I make any changes to the extraction,…