Hi Bill,
You're welcome!
For limits, 4+2 is the target, 5+2 is probably fine, 6+2 is right out. And no, you don't need to anonymize your paper, but there is no penalty for doing so either. WIth system descriptions like these, or large dataset and other language resource papers, the effort required to anonymise effectively is often just too much and not very efficient, so we're not going to ask for that.
Best,
Leon