Your Legend Grows in the Fires of the Crucible...
Here the symbol of the Iron Banner. It can be seen in many areas player symbols, IB medallions and on the huge shield in the Voyager's Walk courtyard.
This symbol is 20 cm in diameter and is about 1 cm thick (tall from the construct stage) and it can print without support content (so long as it is printed with the engraved face upward).
I am going to be designing the crest of the Guards and the Raid symbol along with printable symbols for each player course, feel free to indicate which one you'd like to see