Early to mid-14th Century has always been my favorite and you're right about the surcoat. I can't easily
find my online resources that discussed the variation and development of the surcoat in the middle ages,
but essentially the length of the surcoat become shorter during the 14th C. The next progression point
after the length of mine would have been to become even shorter and much tighter fitting over the
harness by approximately the 1370's. Prior to my 1330 -1350 period the surcoat would've been a
transition between the long and short surcoat. - i.e. short in the front and long in the back, sort of
like the old style tuxedoes with tails!
I'll try harder to find those reference links for you.