There is a problem with your heraldry spec:
Always keep in mind that in the composition of the final representation blue is added first, on top of it red and on top of that yellow. All designs from all sources of either IV.1.1, 1.2 or 1.3 must geometrically work with any other combination. The exact specifications for the file is 1024 x 1024 px png, the shield starting vertically from 400 (±8 px) and ending vertically at 800 (±8px), horizontally from 330 (±12px) and ending horizontally at 660 (±12px). The exact shape of the shield is not specified. In general there should be negative-ish spacevii allowing indifferent superimposition of yellow and blue.
This would place the shield off-center, sitting to the left. Should the shield area be wider, or the blue area?
Also, can these areas overlap if the designs work together. For example, if ornaments curve in kind with the tail of a beast, or a beast's paw rests against a protruding ornament on the edge of a shield? Or will these aspects be interchangeable, thus disallowing such schemes?