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Ok, There are some slits in this object and i wanted to give it some thickness so i duplicated it, scaled down (for the inside part) combined them so they are the one object. My problem is trying to fill the gaps (pointed out in blue), the way i did it was to extrude the edges out on both sides then merge verts in the middle, i want them to be flat so i tried to delete the middle edge but maya says they are border edges.
There is probably an easier way to do it, which i'm hoping someone knows and shares with me
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Any help would be appreciated, even if you have a better technique for modeling something like this where i have to start from scratch.