It's in .jpeg form for highest quality and ease of use. Maybe Ocey has one that's better.An excellent question.
I am pretty attached, being as I made it. But, I might adopt you ambigram into a design of my own...can I get just that part?
Roaring thunderously via Tapatalk...
It will need to be converted to a .gif before it can be used in a sig (for anyone thinking about using it "as is."