A small word of warning if I may;
The one thing that I would mention about the later HYW citadel Six banners is that the shield had very much changed shape at this time compared to the earlier Citadel Six offerings, if indeed as was the general practive (with the vast improvements in plate armours). Their banners and standards look good though.
Worth a thought IMHO if you're looking for 'realism'.
Darrell.