I think the scratch builds really are in a catagory all in their own. I mean every Manda would make their own wouldn't they? There in lys everyones own distinct helmet. It has the basic Fett shape with T-visor but like the paint schemes and size of the helmet along minor differences here and there to signify that mandos taste or family's history or their own personal manda accomplishiments. I understand from Karen T.'s writings that they are sometimes handed down to sibs or if a fellow manda has fallen you may keep their helmet as a homage to their legacy.
Thats why i like these scratch built helmets. I myself haven't done it yet, but i would like to see what Manda spirit / design dwells within me in making my own helmet.
Nice job on the scratch build!