Well I think the way Lance did the tunic is more accurate to the actual ANH costume and not the Mattel "robe without sleeves" that we all got used to. ANH was more Samurai. You can see in some shots that it has parts in the sides which would indicate that it just hangs over the shoulders and is held in place by the belt.
I was the one who gave Lance the pattern.
It will take some futzing to get right but its not hard.
If someone, anyone, could take pics of the cape and tunic just layed out flat we'd all have a better idea.