I had two E2DL heads. I had MIK do a toothless mod on the one with the slighty inferior beam, then lego'd it with an E2E body and tailcap, and gave it to my niece, so there would be no possible issues with her ever carrying it on a plane. The lego was so far beyond anything she would ever own, that I didn't really feel guilty gifting it. Other than that, I don't think I have any duplicates, just too many individual examples.