Oh, those drawings are absolutely in my RP canon now. Cullen still has them. Tucked away someplace. He totally pulls them out whenever he needs a good chuckle. Which is often.

Also, seriously, no CR is more or less valid than any other CR. People are bringing me deep meaningful emotional logs, and that's awesome and important. People are bringing me passing conversations that are only a few comments long, and those are also important. There's no minimum requirement for things you have to give me. If it happened with Cullen, and you want it to still have happened with Cullen, then it's valid.