Location: Reading Mass/Newburyport/merrimack river
Posts: 3,748
No rules just right... just like outback.... if they swim with a fishy motion... who cares if they are a true "cowboy" or not .. when slender baitfish like herring are present, those might do some serious damage....
Those are some nice looking plugs. I don't have any Cowboys, but from what I remember, they are stubbier, fatter, and have a shorter, more aggressive (vs. long and gentle) slope to the head.
I think those you made will catch fish just fine.