Proportions of the design look good. The collarbend around the neck seems to be missing, maybe you'll need some additional plates there?
Could you hold it to your body, please?
Two points to check:
can you move your arm in front of your body or is the chestplate too wide at the armpit?
is the spot where the two chestplates and the upper tip pf the belly plate meet exactly over your solar plexus (the hollos below your sternum)?