That wouldn't work (for me, at least). As soon as I figured out the pattern, I'd know I had a week after the 'deadline' and then the pressure is off until that week is passed/nearly up
That's been my experience with tricks. I'll think of some clever trick to work around my ADHD, and it'll work great for about two weeks. Then after that I'll start anticipating it and working around it. The self-defeating nature of ADHD might be one of the most frustrating things.
Everything is due NOW, seems to work best for me. Just a list to make empty, so I can sleep. Give me deadlines, or ask for estimates, and the task is doomed.