From those pics, the only thing I can really see is that you need to lower your girth belt a bit. It doesn't need to cover the bottom of your gut plate, and it should hide the top "wings" of your cod piece. You will have problems trying to bend forward without giving your gut plate some room to move.
If you can, get a strait-on front pic of you with both arms at your side. I can't tell, but your chest plates may be a tad big in these pics. If the top outside corners of the chest plates are an inch past the bottom outside corners of your collar piece, then that usually is a good signal they need to be cut a bit. Within an inch is usually ok, but over that and you start running into movement problems.
Something I notice on many people is that they don't space their armor correctly. You need around a thumb space between your chest and collar, chest and gut. a sideways index finger (like if your pointing at someoen) space between your chest and diamond. That 99% of the time is perfect spacing.