Almost cracked it

Friday, 6pm, have almost figured out the answer to this design problem I'm fighting. It's really being stubborn, I think because we've been asking the very wrong questions.

The challenge is that the business isn't around for me to ask (of course, it's six pm on a Friday) so I have to wade through this on my own and see what comes out of it on Monday.

The good news is I've been embedded in this team for 9 months and the company for 16 years so I'm hoping my gut can pull me through.