I'm with Tom, what's a 1st cut? Never heard that term on a brisket, but at 6lb, I'll guess flat also.
Traditionally, no, BE's are made from the more fatty point.
BUT, I've seen people cut off the outside edges of the point after cooking, trying to "simulate" burnt ends. Cut them into bite sized cubes, sauce good, put back in for the sauce to get tacky, serve.
The probably is you don't get enough edges and after cutting off the outside, you still have the remaining flat.
I'd cook it to a real tender stage, just little past whatever temp you normally do for slicing.
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