i was looking at the ones on crazy crow when i made my shirt. i went ahead and ordered the plains war shirt, very generally took the pattern, but ended up using an old longsleeve t-shirt as my actual pattern. i knew the shirt fit me already, so i just cut it up at the seams and went from there. id suggest you go that rout. you can still get the pattern fro crazy crow and use it as a general guide, but for a good fit, id use the t-shirt.
just a suggestion.
Phil