Raoul wrote:If you change your device to gyronny argent and gules you should be ok and can keep the counterchanged roundels. However, I'm not sure, but you might run into a problem with the eagle becuase it is a metal and so you would have a metal on a metal (or on argent).
Not a problem--RfS VIII 2 a) ii) reads;
An element equally divided of a color and a metal, and any other element as long as identifiability is maintained
.
So, as long as a gold eagle is displayed equally over a red (or black) and white field, there is still sufficient contrast in the design.
The trick is going to be maintaining identifiability while using the eagle, and surrounding it with rondels. You see the example you provided from the Heraldic Primer--the rondels are bigger than in your original design. The space in between them is all you should consider available to you for the eagle, and that might raise the question as to whether the eagle remains identifiable. Personally, I think that's plenty of space for an identifiable eagle, but the College of Arms adopts some strange ideas sometimes... If you've found some registered Ansteorran devises with gyronny divisions and rondels, with a central charge, that would help provide precedence--although the CoA does change the rules from time to time, and will not regard earlier registered armoury as a presedence for a newly-submitted device to "break the rules."
(during my first submission, I appealed the bouncing of my gyronny of six to the Laurel Sovereign of Arms, citing An Tir's device having a multi-part field of or and argent--he replied to me that An Tir's device was one
they cited as an example of a field that does not provide good contrast at a distance, and was a reason for the rule to disallow metal/metal or colour/colour field divisions of greater than four pieces!)