Whatever...................
Are you not reading anything that people post here?!? THE KWAN DO IS NOT A SWORD. It is a lance and it is held by the center weight. You do NOT hold it by its end. The Blade is heavy and thick the counter balance is heavy and thick. Your measurements have no bearing on the kwan do.
FYI, chinese didn't use a whole lot of body armor.
FYI, a 100 pound plate is no bigger than a large pizza and is only an inch thick. Melt that down into the shape of an anvil and you get a pretty small anvil.
Do us a favor and actually pick one up and learn to use it before you make an endless tirade about something you only vaguely know about.