armybarbies

I have a larger head and am planning to mod the inside so the size isn't that much of a concern to me. I've been researching for about 8 months now and I'm wanting to do it within the next 2 weeks. If I have to mod to make 501st approvable I would be ok with that, I'm just wondering if it's approvable or what will need to be done to make it approvable.

I am looking to start building my armor by buying a helmet. Is eFX a 501st approved helmet? and if not out of the box, can it be made to be?