I do recall some photos of a "cheek pocket" in progress but can't give you a clue how to search for them. IIRC the approach was similar to a bound buttonhole, with the "binding" big enough to form the body of the pocket. There's a lot of layers of fabric at this point so make sure your machine can handle it happily, with accuracy.
As for what you call "internal" pockets, are you thinking of the slash-cut pockets that Freedom Kilts uses, or a simple patch pocket on the inner apron?
Proudly Duncan [maternal], MacDonald and MacDaniel [paternal].
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