Thanks a lot for your time and commentaries guys, you’ve been very kind.
Well, after days and nights of consideration, I think i will pass to ask for royalties. Me vs. a large company its a battle I do not want to fight. I think I prefer to stay in good terms with them, they are happy with my work and I should be happy with that too. I only hope this would bring me more projects with them and then, I would be more careful.
Thanks a lot to all of you guys.
Gabriela